Js carriage return and line feed processing methods and application of replace method_javascript skills

When we enter text in the text box and press Enter, we hope that the web page will also display a line break effect after submission. At this time, we need to process the submitted content

to achieve the effect.
1. Define js native replacement function . There is no replaceAll function in js, we need to customize

Copy code The code is as follows:

String .prototype.replaceAll = function(s1,s2){
return this.replace(new RegExp(s1,"gm"),s2);
}

2 , use js replace for processing

Copy code The code is as follows:

str= str.replaceAll("n", "
")

In this way, you can achieve the effect of js carriage return and line feed!