From 5d0294f5f5196070479e64bacdbf2d7ea9abf852 Mon Sep 17 00:00:00 2001
From: Zignature <siegert.naber@gmail.com>
Date: Sat, 15 Jan 2022 13:20:28 +0100
Subject: [PATCH 1/8] Fix issue #373 problems in urls with special characters

Added function to escape URLs entered via JS prompt.

It's a partial fix because people cannot be stopped entering URLs manually and forgetting to escape them.
---
 src/js/easymde.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/js/easymde.js b/src/js/easymde.js
index cece3b0..72f7254 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -848,6 +848,8 @@ function drawLink(editor) {
         if (!url) {
             return false;
         }
+
+        if (/[()<>]/.test(url)) url = escapeUrl(url);
     }
     _replaceSelection(cm, stat.link, options.insertTexts.link, url);
 }
@@ -865,10 +867,26 @@ function drawImage(editor) {
         if (!url) {
             return false;
         }
+
+        if (/[()<>]/.test(url)) url = escapeUrl(url);
     }
     _replaceSelection(cm, stat.image, options.insertTexts.image, url);
 }
 
+/**
+ * Escape URLs to prevent breaking up rendered Markdown links
+ * @param url {string} The url of the link or image
+ */
+function escapeUrl(url) {
+
+    url = url.replace(/\(/g,'\\(')
+             .replace(/\)/g,'\\)')
+             .replace(/</g,'\\<')
+             .replace(/>/g,'\\>');
+
+    return url;
+}
+
 /**
  * Action for opening the browse-file window to upload an image to a server.
  * @param editor {EasyMDE} The EasyMDE object

From 33489ab616bc2282d29287c1eb55f16948197f48 Mon Sep 17 00:00:00 2001
From: Zignature <siegert.naber@gmail.com>
Date: Sat, 15 Jan 2022 23:26:10 +0100
Subject: [PATCH 2/8] URL encoding and escaping for JS prompt URLs

- URL encoding and escaping added for JS prompt entered URLs
- added option escapeURLs (boolean)
---
 src/js/easymde.js  | 18 ++++++++++--------
 types/easymde.d.ts |  1 +
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/js/easymde.js b/src/js/easymde.js
index 72f7254..b419d5d 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -849,7 +849,10 @@ function drawLink(editor) {
             return false;
         }
 
-        if (/[()<>]/.test(url)) url = escapeUrl(url);
+        if (options.escapeURLs) {
+            url = encodeURI(url);
+            if (/[()]/.test(url)) url = escapeURI(url);
+        }
     }
     _replaceSelection(cm, stat.link, options.insertTexts.link, url);
 }
@@ -868,7 +871,10 @@ function drawImage(editor) {
             return false;
         }
 
-        if (/[()<>]/.test(url)) url = escapeUrl(url);
+        if (options.escapeURLs) {
+            url = encodeURI(url);
+            if (/[()]/.test(url)) url = escapeURI(url);
+        }
     }
     _replaceSelection(cm, stat.image, options.insertTexts.image, url);
 }
@@ -877,12 +883,8 @@ function drawImage(editor) {
  * Escape URLs to prevent breaking up rendered Markdown links
  * @param url {string} The url of the link or image
  */
-function escapeUrl(url) {
-
-    url = url.replace(/\(/g,'\\(')
-             .replace(/\)/g,'\\)')
-             .replace(/</g,'\\<')
-             .replace(/>/g,'\\>');
+function escapeURI(url) {
+    url = url.replace(/\(/g,'\\(').replace(/\)/g,'\\)');
 
     return url;
 }
diff --git a/types/easymde.d.ts b/types/easymde.d.ts
index 2aa161b..b082324 100644
--- a/types/easymde.d.ts
+++ b/types/easymde.d.ts
@@ -197,6 +197,7 @@ declare namespace EasyMDE {
         previewImagesInEditor?: boolean;
         previewRender?: (markdownPlaintext: string, previewElement: HTMLElement) => string;
         promptURLs?: boolean;
+        escapeURLs?: boolean;
         renderingConfig?: RenderingOptions;
         shortcuts?: Shortcuts;
         showIcons?: ReadonlyArray<ToolbarButton>;

From c174b6f149ce9dd6d540beda91331ba7a936e593 Mon Sep 17 00:00:00 2001
From: Zignature <siegert.naber@gmail.com>
Date: Sat, 15 Jan 2022 23:34:05 +0100
Subject: [PATCH 3/8] Changed function name escapeURI to escapedPromptURL and
 option escapeURLs to option escapePromptURLs

---
 src/js/easymde.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/js/easymde.js b/src/js/easymde.js
index b419d5d..8aedf80 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -849,9 +849,9 @@ function drawLink(editor) {
             return false;
         }
 
-        if (options.escapeURLs) {
+        if (options.escapePromptURLs) {
             url = encodeURI(url);
-            if (/[()]/.test(url)) url = escapeURI(url);
+            if (/[()]/.test(url)) url = escapePromptURL(url);
         }
     }
     _replaceSelection(cm, stat.link, options.insertTexts.link, url);
@@ -871,9 +871,9 @@ function drawImage(editor) {
             return false;
         }
 
-        if (options.escapeURLs) {
+        if (options.escapePromptURLs) {
             url = encodeURI(url);
-            if (/[()]/.test(url)) url = escapeURI(url);
+            if (/[()]/.test(url)) url = escapePromptURL(url);
         }
     }
     _replaceSelection(cm, stat.image, options.insertTexts.image, url);
@@ -883,7 +883,7 @@ function drawImage(editor) {
  * Escape URLs to prevent breaking up rendered Markdown links
  * @param url {string} The url of the link or image
  */
-function escapeURI(url) {
+function escapePromptURL(url) {
     url = url.replace(/\(/g,'\\(').replace(/\)/g,'\\)');
 
     return url;

From 47f1e4f892b36b8171f043a9dc5d73a0efe9fef2 Mon Sep 17 00:00:00 2001
From: Zignature <siegert.naber@gmail.com>
Date: Sat, 15 Jan 2022 23:56:27 +0100
Subject: [PATCH 4/8] Updated readme and easymde.d.ts to reflect
 escapePrompURLs option

---
 README.md          | 2 ++
 types/easymde.d.ts | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index f47da4c..fa0b07a 100644
--- a/README.md
+++ b/README.md
@@ -165,6 +165,7 @@ easyMDE.value('New input for **EasyMDE**');
 - **previewClass**: A string or array of strings that will be applied to the preview screen when activated. Defaults to `"editor-preview"`.
 - **previewRender**: Custom function for parsing the plaintext Markdown and returning HTML. Used when user previews.
 - **promptURLs**: If set to `true`, a JS alert window appears asking for the link or image URL. Defaults to `false`.
+- **escapePromptURLs**: If set to `true`, urlencodes and escapes links entered via the JS prompt to prevent malformed Markdown rendered links. Only works when `promptURLs` is set to `true`. Defaults to `false`.
 - **promptTexts**: Customize the text used to prompt for URLs.
   - **image**: The text to use when prompting for an image's URL.  Defaults to `URL of the image:`.
   - **link**: The text to use when prompting for a link's URL. Defaults to `URL for the link:`.
@@ -276,6 +277,7 @@ const editor = new EasyMDE({
         return "Loading...";
     },
     promptURLs: true,
+    escapePromptURLs: true,
     promptTexts: {
         image: "Custom prompt for URL:",
         link: "Custom prompt for URL:",
diff --git a/types/easymde.d.ts b/types/easymde.d.ts
index b082324..12ba258 100644
--- a/types/easymde.d.ts
+++ b/types/easymde.d.ts
@@ -197,7 +197,7 @@ declare namespace EasyMDE {
         previewImagesInEditor?: boolean;
         previewRender?: (markdownPlaintext: string, previewElement: HTMLElement) => string;
         promptURLs?: boolean;
-        escapeURLs?: boolean;
+        escapePromptURLs?: boolean;
         renderingConfig?: RenderingOptions;
         shortcuts?: Shortcuts;
         showIcons?: ReadonlyArray<ToolbarButton>;

From 16545eb0e1b0224e4e1402523aa85e1d0038d5a8 Mon Sep 17 00:00:00 2001
From: Zignature <siegert.naber@gmail.com>
Date: Sun, 16 Jan 2022 00:14:00 +0100
Subject: [PATCH 5/8] Made escaping prompt URLs automatic instead of optional
 again

---
 README.md          |  2 --
 src/js/easymde.js  | 12 ++++--------
 types/easymde.d.ts |  1 -
 3 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/README.md b/README.md
index fa0b07a..f47da4c 100644
--- a/README.md
+++ b/README.md
@@ -165,7 +165,6 @@ easyMDE.value('New input for **EasyMDE**');
 - **previewClass**: A string or array of strings that will be applied to the preview screen when activated. Defaults to `"editor-preview"`.
 - **previewRender**: Custom function for parsing the plaintext Markdown and returning HTML. Used when user previews.
 - **promptURLs**: If set to `true`, a JS alert window appears asking for the link or image URL. Defaults to `false`.
-- **escapePromptURLs**: If set to `true`, urlencodes and escapes links entered via the JS prompt to prevent malformed Markdown rendered links. Only works when `promptURLs` is set to `true`. Defaults to `false`.
 - **promptTexts**: Customize the text used to prompt for URLs.
   - **image**: The text to use when prompting for an image's URL.  Defaults to `URL of the image:`.
   - **link**: The text to use when prompting for a link's URL. Defaults to `URL for the link:`.
@@ -277,7 +276,6 @@ const editor = new EasyMDE({
         return "Loading...";
     },
     promptURLs: true,
-    escapePromptURLs: true,
     promptTexts: {
         image: "Custom prompt for URL:",
         link: "Custom prompt for URL:",
diff --git a/src/js/easymde.js b/src/js/easymde.js
index 8aedf80..db068ef 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -849,10 +849,8 @@ function drawLink(editor) {
             return false;
         }
 
-        if (options.escapePromptURLs) {
-            url = encodeURI(url);
-            if (/[()]/.test(url)) url = escapePromptURL(url);
-        }
+        url = encodeURI(url);
+        if (/[()]/.test(url)) url = escapePromptURL(url);
     }
     _replaceSelection(cm, stat.link, options.insertTexts.link, url);
 }
@@ -871,10 +869,8 @@ function drawImage(editor) {
             return false;
         }
 
-        if (options.escapePromptURLs) {
-            url = encodeURI(url);
-            if (/[()]/.test(url)) url = escapePromptURL(url);
-        }
+        url = encodeURI(url);
+        if (/[()]/.test(url)) url = escapePromptURL(url);
     }
     _replaceSelection(cm, stat.image, options.insertTexts.image, url);
 }
diff --git a/types/easymde.d.ts b/types/easymde.d.ts
index 12ba258..2aa161b 100644
--- a/types/easymde.d.ts
+++ b/types/easymde.d.ts
@@ -197,7 +197,6 @@ declare namespace EasyMDE {
         previewImagesInEditor?: boolean;
         previewRender?: (markdownPlaintext: string, previewElement: HTMLElement) => string;
         promptURLs?: boolean;
-        escapePromptURLs?: boolean;
         renderingConfig?: RenderingOptions;
         shortcuts?: Shortcuts;
         showIcons?: ReadonlyArray<ToolbarButton>;

From 0c2cf4cd51a0f1fe721e7dc70adfdc768449a20c Mon Sep 17 00:00:00 2001
From: Jeroen Akkerman <Jeroen_akkerman1@hotmail.com>
Date: Mon, 17 Jan 2022 00:04:18 +0100
Subject: [PATCH 6/8] Add tests for url prompts

---
 .../{default.html => index.html}              |   0
 .../1-default-editor/preview.spec.js          |   6 +-
 .../1-default-editor/statusbar.spec.js        |   2 +-
 .../1-default-editor/visual.spec.js           |   4 +-
 cypress/integration/2-url-prompt/index.html   |  20 ++
 .../2-url-prompt/url-prompt.spec.js           | 228 ++++++++++++++++++
 cypress/support/commands.js                   |  16 ++
 7 files changed, 269 insertions(+), 7 deletions(-)
 rename cypress/integration/1-default-editor/{default.html => index.html} (100%)
 create mode 100644 cypress/integration/2-url-prompt/index.html
 create mode 100644 cypress/integration/2-url-prompt/url-prompt.spec.js

diff --git a/cypress/integration/1-default-editor/default.html b/cypress/integration/1-default-editor/index.html
similarity index 100%
rename from cypress/integration/1-default-editor/default.html
rename to cypress/integration/1-default-editor/index.html
diff --git a/cypress/integration/1-default-editor/preview.spec.js b/cypress/integration/1-default-editor/preview.spec.js
index ced582c..e437bbe 100644
--- a/cypress/integration/1-default-editor/preview.spec.js
+++ b/cypress/integration/1-default-editor/preview.spec.js
@@ -2,7 +2,7 @@
 
 describe('Preview', () => {
     beforeEach(() => {
-        cy.visit(__dirname + '/default.html');
+        cy.visit(__dirname + '/index.html');
     });
 
     it('can show a preview of markdown text', () => {
@@ -22,9 +22,7 @@ describe('Preview', () => {
         cy.get('.EasyMDEContainer .cm-strong').should('contain', '**');
         cy.get('.EasyMDEContainer .cm-strong').should('contain', 'important');
 
-        // Toggle preview.
-        cy.get('.EasyMDEContainer .editor-toolbar button.preview').click();
-        cy.get('.EasyMDEContainer .editor-preview').should('be.visible');
+        cy.previewOn();
 
         // Check preview window for rendered markdown.
         cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<h1 id="my-big-title">My Big Title</h1>');
diff --git a/cypress/integration/1-default-editor/statusbar.spec.js b/cypress/integration/1-default-editor/statusbar.spec.js
index 12e8276..9b96735 100644
--- a/cypress/integration/1-default-editor/statusbar.spec.js
+++ b/cypress/integration/1-default-editor/statusbar.spec.js
@@ -2,7 +2,7 @@
 
 describe('Default statusbar', () => {
     beforeEach(() => {
-        cy.visit(__dirname + '/default.html');
+        cy.visit(__dirname + '/index.html');
     });
 
     it('loads the editor with default statusbar', () => {
diff --git a/cypress/integration/1-default-editor/visual.spec.js b/cypress/integration/1-default-editor/visual.spec.js
index 0ba1afc..18b7be2 100644
--- a/cypress/integration/1-default-editor/visual.spec.js
+++ b/cypress/integration/1-default-editor/visual.spec.js
@@ -2,10 +2,10 @@
 
 describe('Default editor', () => {
     beforeEach(() => {
-        cy.visit(__dirname + '/default.html');
+        cy.visit(__dirname + '/index.html');
     });
 
-    it('Loads the editor with default settings', () => {
+    it('loads the editor with default settings', () => {
         cy.get('.EasyMDEContainer').should('be.visible');
         cy.get('#textarea').should('not.be.visible');
 
diff --git a/cypress/integration/2-url-prompt/index.html b/cypress/integration/2-url-prompt/index.html
new file mode 100644
index 0000000..aa5f9e5
--- /dev/null
+++ b/cypress/integration/2-url-prompt/index.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Default</title>
+    <link rel="stylesheet" href="../../../dist/easymde.min.css">
+    <script src="../../../dist/easymde.min.js"></script>
+</head>
+
+<body>
+    <textarea id="textarea"></textarea>
+    <script>
+        const easyMDE = new EasyMDE({
+            promptURLs: true,
+        });
+    </script>
+</body>
+
+</html>
diff --git a/cypress/integration/2-url-prompt/url-prompt.spec.js b/cypress/integration/2-url-prompt/url-prompt.spec.js
new file mode 100644
index 0000000..1436b12
--- /dev/null
+++ b/cypress/integration/2-url-prompt/url-prompt.spec.js
@@ -0,0 +1,228 @@
+/// <reference types="cypress" />
+
+describe('URL prompts', () => {
+    beforeEach(() => {
+        cy.visit(__dirname + '/index.html');
+    });
+
+    it('must show the correct text for a link prompt', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            const stub = cy.stub($win, 'prompt');
+            cy.get('button.link').click().then(() => {
+                expect(stub).to.be.calledWith('URL for the link:', 'https://');
+            });
+        });
+    });
+
+    it('must show the correct text for an image prompt', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            const stub = cy.stub($win, 'prompt');
+            cy.get('button.image').click().then(() => {
+                expect(stub).to.be.calledWith('URL of the image:', 'https://');
+            });
+        });
+    });
+
+    it('must enter a link correctly through a prompt', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('can use the prompt multiple times', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            const stub = cy.stub($win, 'prompt');
+            stub.returns('https://example.com');
+            cy.get('button.link').click().then(() => {
+                expect(stub).to.be.calledWith('URL for the link:', 'https://');
+                stub.restore();
+            });
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!{end}{enter}');
+
+        cy.window().then(($win) => {
+            const stub = cy.stub($win, 'prompt');
+            stub.returns('https://example.eu');
+            cy.get('button.link').click().then(() => {
+                expect(stub).to.be.calledWith('URL for the link:', 'https://');
+                stub.restore();
+            });
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.eu)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a second website!');
+
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[Link to a website!](https://example.com)');
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[Link to a second website!](https://example.eu)');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should(
+            'contain.html',
+            '<p><a href="https://example.com" target="_blank">Link to a website!</a><br><a href="https://example.eu" target="_blank">Link to a second website!</a></p>',
+        );
+    });
+
+    it('must be able to deal with parameters in links', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=param&moo=cow');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=param&moo=cow)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=param&amp;moo=cow" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with brackets in links', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=[]param');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=%5B%5Dparam)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=%5B%5Dparam" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with parentheses in links', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=(param)');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=\\(param\\))');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=(param)" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with parentheses in links (multiple)', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=(param1,param2)&more=(param3,param4)&end=true');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=\\(param1,param2\\)&more=\\(param3,param4\\)&end=true)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=(param1,param2)&amp;more=(param3,param4)&amp;end=true" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with unbalanced parentheses in links (opening)', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=(param');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=\\(param)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=(param" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with unbalanced parentheses in links (closing)', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=)param');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=\\)param)');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=)param" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with inequality symbols in links', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=<param');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=%3Cparam');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=%3Cparam" target="_blank">Link to a website!</a></p>');
+    });
+
+    it('must be able to deal with emoji in links', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=👷‍♂️');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=%F0%9F%91%B7%E2%80%8D%E2%99%82%EF%B8%8F');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a 👌 website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=%F0%9F%91%B7%E2%80%8D%E2%99%82%EF%B8%8F" target="_blank">Link to a 👌 website!</a></p>');
+    });
+
+    it('must be able to deal with spaces in links', () => {
+        cy.get('.EasyMDEContainer').should('be.visible');
+        cy.get('#textarea').should('not.be.visible');
+
+        cy.window().then(($win) => {
+            cy.stub($win, 'prompt').returns('https://example.com?some=very special param');
+            cy.get('button.link').click();
+        });
+        cy.get('.EasyMDEContainer .CodeMirror').contains('[](https://example.com?some=very%20special%20param');
+        cy.get('.EasyMDEContainer .CodeMirror').type('{home}{rightarrow}Link to a website!');
+
+        cy.previewOn();
+
+        cy.get('.EasyMDEContainer .editor-preview').should('contain.html', '<p><a href="https://example.com?some=very%20special%20param" target="_blank">Link to a website!</a></p>');
+    });
+});
diff --git a/cypress/support/commands.js b/cypress/support/commands.js
index d7e51ad..4927ac8 100644
--- a/cypress/support/commands.js
+++ b/cypress/support/commands.js
@@ -13,3 +13,19 @@ Cypress.Commands.add(
         return unquote(before.getPropertyValue(property));
     },
 );
+
+Cypress.Commands.add('previewOn' , () => {
+    cy.get('.EasyMDEContainer .editor-preview').should('not.be.visible');
+    cy.get('.EasyMDEContainer .editor-toolbar button.preview').should('not.have.class', 'active');
+    cy.get('.EasyMDEContainer .editor-toolbar button.preview').click();
+    cy.get('.EasyMDEContainer .editor-toolbar button.preview').should('have.class', 'active');
+    cy.get('.EasyMDEContainer .editor-preview').should('be.visible');
+});
+
+Cypress.Commands.add('previewOff' , () => {
+    cy.get('.EasyMDEContainer .editor-preview').should('be.visible');
+    cy.get('.EasyMDEContainer .editor-toolbar button.preview').should('have.class', 'active');
+    cy.get('.EasyMDEContainer .editor-toolbar button.preview').click();
+    cy.get('.EasyMDEContainer .editor-toolbar button.preview').should('not.have.class', 'active');
+    cy.get('.EasyMDEContainer .editor-preview').should('not.be.visible');
+});

From d8eae5d74c96e5b5dfa52ac39b92e76de432233b Mon Sep 17 00:00:00 2001
From: Jeroen Akkerman <Jeroen_akkerman1@hotmail.com>
Date: Mon, 17 Jan 2022 00:06:44 +0100
Subject: [PATCH 7/8] Improve readability of encode/escape functionality

---
 src/js/easymde.js | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/src/js/easymde.js b/src/js/easymde.js
index db068ef..dbb0135 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -844,13 +844,11 @@ function drawLink(editor) {
     var options = editor.options;
     var url = 'https://';
     if (options.promptURLs) {
-        url = prompt(options.promptTexts.link, 'https://');
+        url = prompt(options.promptTexts.link, url);
         if (!url) {
             return false;
         }
-
-        url = encodeURI(url);
-        if (/[()]/.test(url)) url = escapePromptURL(url);
+        url = escapePromptURL(url);
     }
     _replaceSelection(cm, stat.link, options.insertTexts.link, url);
 }
@@ -864,25 +862,21 @@ function drawImage(editor) {
     var options = editor.options;
     var url = 'https://';
     if (options.promptURLs) {
-        url = prompt(options.promptTexts.image, 'https://');
+        url = prompt(options.promptTexts.image, url);
         if (!url) {
             return false;
         }
-
-        url = encodeURI(url);
-        if (/[()]/.test(url)) url = escapePromptURL(url);
+        url = escapePromptURL(url);
     }
     _replaceSelection(cm, stat.image, options.insertTexts.image, url);
 }
 
 /**
- * Escape URLs to prevent breaking up rendered Markdown links
+ * Encode and escape URLs to prevent breaking up rendered Markdown links.
  * @param url {string} The url of the link or image
  */
 function escapePromptURL(url) {
-    url = url.replace(/\(/g,'\\(').replace(/\)/g,'\\)');
-
-    return url;
+    return encodeURI(url).replace(/([\\()])/g, '\\$1');
 }
 
 /**

From 81ec7780bc462e38755bf03ab52ed8bf797cd3f0 Mon Sep 17 00:00:00 2001
From: Jeroen Akkerman <Jeroen_akkerman1@hotmail.com>
Date: Mon, 17 Jan 2022 00:09:00 +0100
Subject: [PATCH 8/8] Update changelog

---
 CHANGELOG.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4090519..a7b979f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,10 @@ All notable changes to easymde will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-<!-- ## [Unreleased] -->
+## [Unreleased]
+### Fixed
+- URLs with certain characters entered through prompts causing invalid markdown (Thanks to [@Zignature], [#393]).
+
 ## [2.16.1] - 2022-01-14
 ### Fixed
 - Incorrect initial line and column count in status bar.
@@ -240,6 +243,7 @@ Project forked from [SimpleMDE](https://github.com/sparksuite/simplemde-markdown
 [#9]: https://github.com/Ionaru/easy-markdown-editor/issues/9
 
 <!-- Linked PRs -->
+[#393]: https://github.com/Ionaru/easy-markdown-editor/pull/393
 [#389]: https://github.com/Ionaru/easy-markdown-editor/pull/389
 [#388]: https://github.com/Ionaru/easy-markdown-editor/pull/388
 [#384]: https://github.com/Ionaru/easy-markdown-editor/pull/384