In order to set caret cursor position in content editable elements like div tag is carried over by JavaScript Range interface. The range is created using document.createRange() method.
Approach 1:
- First, create Range and set position using above syntax.
- Get user input from input tag using jQuery
$("input']").val(); - On button click assign input value to range function to return cursor position on div.
Following syntax explain clearly:
Syntax:
// document.createRange() creates new range object var rangeobj = document.createRange(); // Here 'rangeobj' is created Range Object var selectobj = window.getSelection(); // Here 'selectobj' is created object for window // get selected or caret current position. // Setting start position of a Range rangeobj.setStart(startNode, startOffset); // Setting End position of a Range rangeobj.setEnd(endNode, endOffset); // Collapses the Range to one of its // boundary points rangeobj.collapse(true); // Removes all ranges from the selection // except Anchor Node and Focus Node selectobj.removeAllRanges(); // Adds a Range to a Selection selectobj.addRange(rangeobj);
Example 1: Below example illustrate how to set caret cursor position on content-editable element div based on user input.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <script src= </script> <style> div { outline-color: red; caret-color: red; color: #ddd; width: 550px; text-align: justify; border: 2px solid red; } </style> </head> <body> <center> <h1 style="color:green;padding:13px;"> GeeksforGeeeks </h1> <br> <div id="editable" contenteditable="true" spellcheck="false"> HTML stands for Hyper Text Markup Language. It is used to design web pages using markup language. HTML is the combination of Hypertext and Markup language. Hypertext defines the link between the web pages. Markup language is used to define the text document within tag which defines the structure of web pages. HTML is a markup language which is used by the browser to manipulate text, images and other content to display it in required format. </div> <br/> <input type="number" name="position" min="0" value="0" max="470" /> <button>Position Cursor</button> </center> <script> function setCursor(pos) { var tag = document.getElementById("editable"); // Creates range object var setpos = document.createRange(); // Creates object for selection var set = window.getSelection(); // Set start position of range setpos.setStart(tag.childNodes[0], pos); // Collapse range within its boundary points // Returns boolean setpos.collapse(true); // Remove all ranges set set.removeAllRanges(); // Add range with respect to range object. set.addRange(setpos); // Set cursor on focus tag.focus(); } $('button').click(function() { var $pos = $("input[name='position']").val(); setCursor($pos); }); </script> </body> </html> |
Output:
- Before Entering the position:
- After Entering the position:
Approach 2:
- First create Range and set position using above syntax.
- On button click trigger function to return cursor position on div.
Example 2: Below example illustrates how to set caret cursor position on content-editable element div.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <script src= </script> <style> div { outline-color: red; caret-color: red; color: #ddd; width: 550px; text-align: justify; border: 2px solid red; } </style> </head> <body> <center> <h1 style="color:green;padding:13px;"> GeeksforGeeeks </h1> <br> <div id="editable" contenteditable="true" spellcheck="false"> HTML stands for Hyper Text Markup Language. It is used to design web pages using markup language. HTML is the combination of Hypertext and Markup language. Hypertext defines the link between the web pages. Markup language is used to define the text document within tag which defines the structure of web pages. HTML is a markup language which is used by the browser to manipulate text, images and other content to display it in required format. </div> <br/> <button>Position Cursor</button> </center> <script> function positionCursor() { var tag = document.getElementById("editable"); // Creates range object var setpos = document.createRange(); // Creates object for selection var set = window.getSelection(); // Set start position of range setpos.setStart(tag.childNodes[0], 12); // Collapse range within its boundary points // Returns boolean setpos.collapse(true); // Remove all ranges set set.removeAllRanges(); // Add range with respect to range object. set.addRange(setpos); // Set cursor on focus tag.focus(); } $('button').click(function() { positionCursor(); }); </script> </body> </html> |
Output:
- Before Clicking the Button:
- After Clicking the Button:
Reference: https://developer.mozilla.org/en-US/docs/Web/API/Range
