用JavaScript替换段落中的文本

Question

For my app I have information from an API coming in, which is a bunch of text, put in between paragraph tags. However, sometimes the text will say "null". How do I remove any text which has "null" and replace it with "No info" with Javascript? Similar to a swear filter.

Answer 1

Just

all_string.replace('null', 'No Info');

In that way, you may trans words like disannulling will be turned into disanNo Infoing . So you should use regex to match the spec null word:

all_string.replace(/\bnull\b/g, 'No Info');

Example

 var element = document.querySelector('p'); element.innerHTML = element.innerHTML.replace(/\\bnull\\b/g, 'No Info'); 

 <p>this is the first null line. another null null null. thisnull will not be replaced. </p> 

Answer 2

To replace text you can use the String.prototype.replace() function.

You can use it like this:

YOUR_STRING = YOUR_STRING.replace(/\bnull\b/g, "No info");

Check it out: http://jsfiddle.net/a9osg2zp/

Answer 3

You can use the replace function.

If you want to replace multiples you will want to use regex.

For example,

"hello hello".replace("hello","goodbye")

Outputs: "goodbye hello"

"hello hello".replace(/hello/g,"goodbye")

Outputs: "goodbye goodbye"

Answer 4

 while(APIString.indexOf('null') != -1){ APIString.replace('null','No info'); }