在文本框的焦点上设置光标长度为 14

2022-01-13 00:00:00 textbox javascript html cursor-position onfocus

大家好，我想在一个没有值的文本框上将光标设置在长度为 14 的位置.我知道最初光标将在 0 我希望它在 14

Hai Guys, I want to set cursor at a position of length 14 on a textbox which will not have a value.. Iknow initially cursor will be at 0 i want it to be at 14

推荐答案

IE 在设置光标位置时使用了与 Firefox、Opera 和 Chrome 不同的方法.最好制作一个辅助函数，它会为你做这件事.我用这个来满足自己的需要.

IE use different approach at setting cursor position than Firefox,Opera and Chrome. It's better to make a helper function, which will do it for you. I use this one for own needs.

function setCursor(node,pos){

    node = (typeof node == "string" || node instanceof String) ? document.getElementById(node) : node;

    if(!node){
        return false;
    }else if(node.createTextRange){
        var textRange = node.createTextRange();
        textRange.collapse(true);
        textRange.moveEnd(pos);
        textRange.moveStart(pos);
        textRange.select();
        return true;
    }else if(node.setSelectionRange){
        node.setSelectionRange(pos,pos);
        return true;
    }

    return false;
}

最后一件事是从您的 onfocus 处理程序中调用它.

Last thing, is to call it from your onfocus handler.

祝你好运

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