如何使用JQuery InsertAtCaret函数 [英] How to use JQuery InsertAtCaret Function

问题描述

我找到了JQuery InsertAtCaret函数这里但是没有详细说明如何使用它。我已经尝试了很多东西，以了解如何使用它，但找不到任何方法。这是函数。

I have found JQuery InsertAtCaret Function Here But there is no detail given how to use it. I have tried a lot to understand that how it can be used, but could not find any way. Here is the function.

$.fn.insertAtCaret = function(myValue) {
    return this.each(function() {
        var me = this;
        if (document.selection) { // IE
            me.focus();
            sel = document.selection.createRange();
            sel.text = myValue;
            me.focus();
        } else if (me.selectionStart || me.selectionStart == '0') { // Real browsers
            var startPos = me.selectionStart, endPos = me.selectionEnd, scrollTop = me.scrollTop;
            me.value = me.value.substring(0, startPos) + myValue + me.value.substring(endPos, me.value.length);
            me.focus();
            me.selectionStart = startPos + myValue.length;
            me.selectionEnd = startPos + myValue.length;
            me.scrollTop = scrollTop;
        } else {
            me.value += myValue;
            me.focus();
        }
    });
};

我有一个文本框输入字段和一个textarea。我应该在哪里调用此函数，我应该给它什么值。而且我必须提供我的textarea的引用。

I have a textbox input field and a textarea below it. Where Should I call this function and what value should I give it. And Where I have to give the reference of my textarea.

推荐答案

以下是上述插件的修改版本：

Here is modified version of above plugin:

jQuery.fn.extend({
insertAtCaret: function(myValue){
  return this.each(function(i) {
    if (document.selection) {
      //For browsers like Internet Explorer
      this.focus();
      sel = document.selection.createRange();
      sel.text = myValue;
      this.focus();
    }
    else if (this.selectionStart || this.selectionStart == '0') {
      //For browsers like Firefox and Webkit based
      var startPos = this.selectionStart;
      var endPos = this.selectionEnd;
      var scrollTop = this.scrollTop;
      this.value = this.value.substring(0, startPos)+myValue+this.value.substring(endPos,this.value.length);
      this.focus();
      this.selectionStart = startPos + myValue.length;
      this.selectionEnd = startPos + myValue.length;
      this.scrollTop = scrollTop;
    } else {
      this.value += myValue;
      this.focus();
    }
  })
}
});

基本上，这个插件允许你在多个 textbox 或 textarea 。您可以像这样使用它：

Basically, this plugin allows you to insert a piece of text at caret of multiple textbox or textarea . You can use it like this:

 $('#element1, #element2, #element3, .class-of-elements').insertAtCaret('text');

工作演示

这篇关于如何使用JQuery InsertAtCaret函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！