Return the position of the first occurrence of the string passed as parameter in the current string.
It returns the index of the start of the occurrence, or -1 if no occurrence is found.
'JavaScript'.search('Script') //4
'JavaScript'.search('TypeScript') //-1
You can search using a regular expression (and in reality, even if you pass a string, that’s internally and transparently used as a regular expression too).
'JavaScript'.search(/Script/) //4
'JavaScript'.search(/script/i) //4
'JavaScript'.search(/a+v/) //1
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