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In javascript, you can use the replace () method of the String object to replace characters in a string, with the syntax "str.replace (" string to be replaced "," new string ") or" str.replace (/ string / g to be replaced, "" new string ").

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Javascript string replacement character

Replacing all strings in js can be done in the following ways:

Two kinds of differences: regular & conventional

Str.replace ("string to be replaced", "new string") str.replace (/ string to be replaced / g, "new string")

Example 1:

Yyyy-MM-dd-hh-mm-ss ".replace ("-"," / ")

The results are as follows:

"yyyy/MM-dd-hh-mm-ss"

Example 2:

"yyyy-MM-dd-hh-mm-ss" .replace (/-/ g, "/")

The results are as follows:

"yyyy/MM/dd/hh/mm/ss"

To sum up:

Regular substitution will only replace the characters that match for the first time, and regular replacement can replace all of them.

Description: JavaScript replace () method

The eplace () method is used to replace some characters in a string with other characters, or to replace a substring that matches a regular expression.

Grammar

StringObject.replace (regexp/substr,replacement) parameter describes regexp/substr

Necessary. A RegExp object that specifies the substring or the schema to replace.

Note that if the value is a string, it is treated as an immediate amount of text pattern to retrieve, rather than being first converted to a RegExp object.

Replacement is required. A string value. Specifies the function that replaces the text or generates the alternate text.

Return value

A new string is obtained after replacing the first match or all matches of regexp with replacement.

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