match `~! @-sharp$% ^ & * () _ +-= [] {} |;: ",. / < >? these special symbols, how to write regular, always report errors. I don"t know what needs to be escaped
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match `~! @-sharp$% ^ & * () _ +-= [] {} |;: ",. / < >? these special symbols, how to write regular, always report errors. I don"t know what needs to be escaped
.wrap them together in square brackets, and then escape a set of square brackets in the outermost square brackets with a backslash
/[`~!@-sharp$%^&*()_+-=\[\]{}|;:'",./<>?]/symbols are escaped, and then you can match the items that are allowed to be entered.
reference: Chinese third edition of javascript Advanced programming, P103
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