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? ? ????? CSS ???? JavaScript? ??? ???? CSS? ???? ??? ??????

JavaScript? ??? ???? CSS? ???? ??? ??????

Nov 17, 2024 pm 12:29 PM

How to Change the CSS of Selected Text with JavaScript?

JavaScript? ???? ??? ???? CSS ??

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function highlightSelText() {
    var SelText;
    if (window.getSelection) {
        SelText = window.getSelection();
    } else if (document.getSelection) {
        SelText = document.getSelection();
    } else if (document.selection) {
        SelText = document.selection.createRange().text;
    }
    $(SelText).css({'background-color' : 'yellow', 'font-weight' : 'bolder'});
}

???:

?? ??? ??? jQuery? CSS? ?? ??? ? ??? ??????. ??? ???. ?? ???? ?? ??? ??? ?? ?????? ???? ???? ??? ???? execCommand() ???? ???? ????.

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function makeEditableAndHighlight(colour) {
    var range, sel = window.getSelection();
    if (sel.rangeCount && sel.getRangeAt) {
        range = sel.getRangeAt(0);
    }
    document.designMode = "on";
    if (range) {
        sel.removeAllRanges();
        sel.addRange(range);
    }
    if (!document.execCommand("HiliteColor", false, colour)) {
        document.execCommand("BackColor", false, colour);
    }
    document.designMode = "off";
}

function highlight(colour) {
    var range, sel;
    if (window.getSelection) {
        // IE9 and non-IE
        try {
            if (!document.execCommand("BackColor", false, colour)) {
                makeEditableAndHighlight(colour);
            }
        } catch (ex) {
            makeEditableAndHighlight(colour)
        }
    } else if (document.selection && document.selection.createRange) {
        // IE <= 8 case
        range = document.selection.createRange();
        range.execCommand("BackColor", false, colour);
    }
}

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