i have a url search key like that: ?retailerKey=A and i want to grab the retailerKey substring. All examples that i saw are having as example how to take before the char with the indexOf example. How can i implement this to have this substring from the string ?retailerKey=A

CodePudding user response：

use regex expression. Following will return the value between character ? and =

var result =  "?retailerKey=A".match(/\?(.*)\=/).pop();
console.log(result);

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CodePudding user response：

If you would like to always get the string between your query sign and equal sign ?ThisString= then you can simply use indexOf for example

str.slice(str.indexOf('?') 1,str.indexOf('='))

CodePudding user response：

Using library could be a better choice but to do it from scratch : I suggest to use split with a regular expression.

// split for char equals to ? or & or =;
const url = '/toto?titi=1&tata=2';
const args = url.split(/[\?\&\=]/);
// shift the first element of the list since it the base url before "?"
args.shift();

// detect malformed url
if (args.length % 2) {
    console.error('malformed url', args);
}

const dictArgs = {};

for (let i = 0; i < args.length /2; i   ) {
     const key = args[2*i];
     const val = args[2*i 1];
     dictArgs[key] = val;
}

console.log(dictArgs);
    

CodePudding user response：

You could split() the string on any ? or = and take the middle item ([1]) from the outcome array.

const data = "?retailerKey=A";
const result = data.split(/[\?=]/)[1];

console.log(result);

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