测试特殊字符JavaScript [英] Testing for special characters JavaScript

问题描述

假设我有这个HTML元素：

 < td>& mdash;< / td> 
  

当被浏览器解析时，& mdash; 转换为实际的em-dash，如下所示：

 < td>  - < / td> 
  

如何测试& mdash; 在我的JavaScript代码中不使用其他字符？

  console.log（elem.innerHTML ==& mdash;） ; //假
 console.log（elem.textContent ==& mdash;）; // false 
 console.log（elem.innerHTML == - ）; // true 
 console.log（elem.textContent == - ）; // true 
  

解决方案

您可以创建一个新的DOM元素，并比较两者：

/ ** *测试一个DOM元素的内部HTML是===& mdash; * / function mdashTest（el）{var tempEl = document.createElement（'div'）; tempEl.innerHTML ='& mdash;';返回el.innerHTML === tempEl.innerHTML;} //测试它！elem = document.getElementById（'dash'）; alert（mdashTest（elem））;

< div id =dash>& mdash;< / div>

Say I have this HTML element:

<td>&mdash;</td>

When parsed by browsers, — is converted to an actual em-dash, like so:

<td>—</td>

How can I test for — without using other characters in my JavaScript code?

console.log(elem.innerHTML == "—"); // false
console.log(elem.textContent == "—"); // false
console.log(elem.innerHTML == "—"); // true
console.log(elem.textContent == "—"); // true

解决方案

You could create a new DOM element, and compare the two:

/**
 * Test that a DOM element's inner HTML is === —
 */
function mdashTest(el) {
    var tempEl = document.createElement('div');
    tempEl.innerHTML = '—';

    return el.innerHTML === tempEl.innerHTML;
}

// Test it!
elem = document.getElementById('dash');
alert( mdashTest( elem ) );

<div id="dash">&mdash;</div>

这篇关于测试特殊字符JavaScript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！