Question

我有以下html，我想用带有空格的下划线替换所有出现在div xyz

的div中的锚标记

<div class="xyz">
  <b><a>Hello_1</a></b>
</div>
<div class="xyz">
   <b><a>Hello_2</a></b>
</div>

以下不起作用？

$('.xyz').each(function() {
   var $this = $(this);

   $this.find('a').text().replace(/_/g, ' '));
});

Answer 1

正则表达式没有问题。您没有更新DOM中的文本。 .text()给出了textContent元素，它没有设置它。您可以使用text() setter，如下所示

$('.xyz a').text(function(i, text) {
    return text.replace(/_/g, ' ');
});

$('.xyz a').text(function(i, text) {
  return text.replace(/_/g, ' ');
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="xyz">
  <b><a>Hello_1</a></b>
</div>
<div class="xyz">
  <b><a>Hello_2</a></b>
</div>

Answer 2

您忘了替换您更改的文字

$('.xyz').each(function() {
    $(this).find('a').each(function(){
       var newText = $(this).text().replace(/_/g, ' ');
       $(this).text(newText);
  });

});

在评论后编辑

Answer 3

需要......

var newText = $this.find('a').text().replace(/_/g, ' '));
$(this).find('a').text(newText);

在循环中遍历DOM usig find是一种昂贵的方法。您可以循环并将所有锚标记首先放入数组中，这可能也取决于锚标记的数量。

Answer 4

循环后替换dom元素。

＆＃13;

{
  "name": "example-app",
  "version": "1.0.0",
  "description": "Example App",
  "main": "index.js",
  "scripts": {
    "start": "nodemon --use_strict index.js",
    "bundle": "webpack"
  },
  "license": "ISC",
  "dependencies": {
    "bcrypt": "^1.0.2",
    "body-parser": "^1.17.2",
    "bootstrap": "^4.0.0-alpha.6",
    "express": "^4.15.4",
    "jsonwebtoken": "^7.4.3",
    "material-ui": "^0.19.0",
    "mongoose": "^4.11.7",
    "passport": "^0.4.0",
    "passport-local": "^1.0.0",
    "react": "^15.6.1",
    "react-addons-css-transition-group": "^15.6.0",
    "react-addons-transition-group": "^15.6.0",
    "react-dom": "^15.6.1",
    "react-router-dom": "^4.2.2",
    "react-tap-event-plugin": "^2.0.1",
    "reactstrap": "^4.8.0",
    "validator": "^8.0.0"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "clean-webpack-plugin": "^0.1.16",
    "css-loader": "^0.28.5",
    "file-loader": "^0.11.2",
    "html-webpack-plugin": "^2.30.1",
    "nodemon": "^1.11.0",
    "style-loader": "^0.18.2",
    "url-loader": "^0.5.9",
    "webpack": "^3.5.5",
    "webpack-dev-server": "^2.7.1"
  }
}

＆＃13;

$('.xyz').each(function() {
   var $this =  $(this).find('a');
   $this.text( $this.text().replace(/_/g, ' '));
});

＆＃13;

JQuery - 用空间替换下划线

4 个答案: