javascript .replace html标签不会替换

Question

I am trying to replace some html but the replace is not taking place. I am using the javascript .replace and from what I can see I am using it right.

content.replace('<link rel="stylesheet" href="style.css">', '<style>html{background-color: blue;}<\/style>');

Answer 1

The strings replace() method returns a new string with the new value. It doesn't modify the original string.

Here is a simple example:

var str = "Hello World!";
var res = str.replace("World", "Foo");

console.log(str);  // prints Hello World!

Answer 2

应该这样做：

$('[href="style.css"]').prepend("html{background-color: blue;}");

Answer 3

As stated the replace doesn't modify the original string.

Try the below example,

document.getElementById("demo").innerHTML = "Paragraph changed!";

Info here