in the introduction to the replace () method of w3school, there is an example:
//
name = ""a", "b"";
name.replace(/"([^"]*)"/g, ""$1""); // "a", "b"and replace it with the following abbreviation
name = ""a", "b"";
name.replace(/"/g, """); // "a", "b" the effect is the same. If the latter can be realized, why use the former? Is it just to illustrate the use of $1 or is it beneficial?
these two regular expressions have different meanings
you replace (/ "/ g,"'"); converts all " into '
and the expression replace (/ "([^"] *) "/ g,"'$1' "); wraps all double quotation marks without the value of double quotation marks in the middle, replacing it with single quotation marks.
for example, there is a string like this: '"dsds" dsd "," ggfgfg "
the replacement result is: `
'"dsds"dsd","ggfgfg"'.replace(/"/g, "'");//:'dsds'dsd','ggfgfg'
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