javascript - What is the meaning of this regular expression in java script -


what meaning of expression. unable understand ?

function escaperegexp(string){   return string.replace(/([.*+?^=!:${}()|[\]\/\\])/g, "\\$1"); }

this has function of introducing backslash character \ before characters in regular expression set [...].

the characters are: . * + ? ^ = ! : $ { } ( ) | [ ] / \

note of these escaped \ because have special meaning within context of regular expression, /, , within set, ].

the outer brackets in regular expression have effect of "capturing" resulting match, , in second argument function, $1 result of capture. /g option means repeat "globally", or many times match.


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