Selecting text in an element (akin to highlighting with your mouse)

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孤街浪徒
孤街浪徒 2020-11-21 05:58

I would like to have users click a link, then it selects the HTML text in another element (not an input).

By \"select\" I mean the same way you would select

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16条回答
  • 2020-11-21 06:08

    According to the jQuery documentation of select():

    Trigger the select event of each matched element. This causes all of the functions that have been bound to that select event to be executed, and calls the browser's default select action on the matching element(s).

    There is your explanation why the jQuery select() won't work in this case.

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  • 2020-11-21 06:09

    An Updated version that works in chrome:

    function SelectText(element) {
        var doc = document;
        var text = doc.getElementById(element);    
        if (doc.body.createTextRange) { // ms
            var range = doc.body.createTextRange();
            range.moveToElementText(text);
            range.select();
        } else if (window.getSelection) {
            var selection = window.getSelection();
            var range = doc.createRange();
            range.selectNodeContents(text);
            selection.removeAllRanges();
            selection.addRange(range);
    
        }
    }
    
    $(function() {
        $('p').click(function() {
            SelectText("selectme");
    
        });
    });
    

    http://jsfiddle.net/KcX6A/326/

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  • 2020-11-21 06:10

    here is another simple solution to get the selected the text in the form of string, you can use this string easily to append a div element child into your code:

    var text = '';
    
    if (window.getSelection) {
        text = window.getSelection();
    
    } else if (document.getSelection) {
        text = document.getSelection();
    
    } else if (document.selection) {
        text = document.selection.createRange().text;
    }
    
    text = text.toString();
    
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  • 2020-11-21 06:12

    Plain Javascript

    function selectText(node) {
        node = document.getElementById(node);
    
        if (document.body.createTextRange) {
            const range = document.body.createTextRange();
            range.moveToElementText(node);
            range.select();
        } else if (window.getSelection) {
            const selection = window.getSelection();
            const range = document.createRange();
            range.selectNodeContents(node);
            selection.removeAllRanges();
            selection.addRange(range);
        } else {
            console.warn("Could not select text in node: Unsupported browser.");
        }
    }
    
    const clickable = document.querySelector('.click-me');
    clickable.addEventListener('click', () => selectText('target'));
    <div id="target"><p>Some text goes here!</p><p>Moar text!</p></div>
    <p class="click-me">Click me!</p>

    Here is a working demo. For those of you looking for a jQuery plugin, I made one of those too.


    jQuery (original answer)

    I have found a solution for this in this thread. I was able to modify the info given and mix it with a bit of jQuery to create a totally awesome function to select the text in any element, regardless of browser:

    function SelectText(element) {
        var text = document.getElementById(element);
        if ($.browser.msie) {
            var range = document.body.createTextRange();
            range.moveToElementText(text);
            range.select();
        } else if ($.browser.mozilla || $.browser.opera) {
            var selection = window.getSelection();
            var range = document.createRange();
            range.selectNodeContents(text);
            selection.removeAllRanges();
            selection.addRange(range);
        } else if ($.browser.safari) {
            var selection = window.getSelection();
            selection.setBaseAndExtent(text, 0, text, 1);
        }
    }
    
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  • 2020-11-21 06:13

    lepe - That works great for me thanks! I put your code in a plugin file, then used it in conjunction with an each statement so you can have multiple pre tags and multiple "Select all" links on one page and it picks out the correct pre to highlight:

    <script type="text/javascript" src="../js/jquery.selecttext.js"></script>
    <script type="text/javascript">
      $(document).ready(function() { 
            $(".selectText").each(function(indx) {
                    $(this).click(function() {                 
                        $('pre').eq(indx).selText().addClass("selected");
                            return false;               
                        });
            });
      });
    

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  • 2020-11-21 06:13

    My particular use-case was selecting a text range inside an editable span element, which, as far as I could see, is not described in any of the answers here.

    The main difference is that you have to pass a node of type Text to the Range object, as described in the documentation of Range.setStart():

    If the startNode is a Node of type Text, Comment, or CDATASection, then startOffset is the number of characters from the start of startNode. For other Node types, startOffset is the number of child nodes between the start of the startNode.

    The Text node is the first child node of a span element, so to get it, access childNodes[0] of the span element. The rest is the same as in most other answers.

    Here a code example:

    var startIndex = 1;
    var endIndex = 5;
    var element = document.getElementById("spanId");
    var textNode = element.childNodes[0];
    
    var range = document.createRange();
    range.setStart(textNode, startIndex);
    range.setEnd(textNode, endIndex);
    
    var selection = window.getSelection();
    selection.removeAllRanges();
    selection.addRange(range);
    

    Other relevant documentation:
    Range
    Selection
    Document.createRange()
    Window.getSelection()

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