How do I extend selection to word boundary using JavaScript, once only?

Question

I\'m using the technique shown in this answer to extend a web page\'s selection to a word boundary:

function snapSelectionToWord() {
    var sel;

    // Che         


        

Answer 1

your code does not work properly in arabic text you can try this snippet nstead

function snapSelectionToWord() {
    var sel;

    // Check for existence of window.getSelection() and that it has a
    // modify() method. IE 9 has both selection APIs but no modify() method.
    if (window.getSelection && (sel = window.getSelection()).modify) {
        sel = window.getSelection();
        if (sel.isCollapsed) {
           
           var rng2 = sel.getRangeAt(0);
           var startOffset = rng2.startOffset;
           startOffset = 0
           for (var i = rng2.startOffset; i >= 0; i--) {
              if (rng2.startContainer.data[i].match(/\S/) != null) {
                 startOffset++;
              } else
                 break;
           }
           var endOffset = rng2.endOffset;
           endOffset = 0;
           for (var i = rng2.endOffset; i < rng2.endContainer.data.length; i++)
              if (rng2.endContainer.data[i].match(/\S/)) {
                 endOffset++;
              } else
                 break;

           startOffset = rng2.startOffset - startOffset;
           startOffset = startOffset < 0 ? 0 : startOffset;

           endOffset = rng2.endOffset + endOffset;
           endOffset = endOffset >= rng2.endContainer.data.length ? rng2.endContainer.data.length - 1 : endOffset;

           rng2.setStart(rng2.startContainer, startOffset);
           rng2.setEnd(rng2.endContainer, endOffset);
           sel.removeAllRanges();
           sel.addRange(rng2);
           
        }
    } else if ( (sel = document.selection) && sel.type != "Control") {
        var textRange = sel.createRange();
        if (textRange.text) {
            textRange.expand("word");
            // Move the end back to not include the word's trailing space(s),
            // if necessary
            while (/\s$/.test(textRange.text)) {
                textRange.moveEnd("character", -1);
            }
            textRange.select();
        }
    }
}