The method of _javascript of Js carriage return and the application of replacement technique

When we enter the text box to knock down the return, we hope that after the submission of the page will also show the effect of line-wrapping, then we need to do the content of the submission to deal with

Before they can achieve results.
1, the definition of JS native replacement function . JS has no replaceall function, we need to customize

Copy Code code as follows:

String.prototype.replaceAll = function (S1,S2) {
Return This.replace (New RegExp (S1, "GM"), S2);
}

2, the use of JS replace for processing

Copy Code code as follows:

Str=str.replaceall ("\ n", "<br/>")

This way you can do the effect of JS return line change!