how to get value from href in javascript

Question

I have the following url of my html page, and I am looking for a way to get the value "1997" passed into a string using javascript.

I am thinking of using Regex, but isn't there a much simpler way?

http://localhost:8080/App/sample?proj=1997

Answer 1

Here is a quick function using split and a for loop.

function getParam (url, param) {
  try {
    /* Get the parameters. */
    var params = url.split("?")[1].split("&");

    /* Iterate over each parameter. */
    for (var i = 0, l = params.length; i < l; i++) {
      /* Split the string to a key-value pair */
      var pair = params[i].split("=");

      /* Check whether the param given matches the one iterated. */
      if (pair[0] == param) return pair[1];  
    }
  } catch (e) {}
  
  /* Return null, if there is no match. */
  return null;
}

/* Example. */
console.log(
  getParam("http://localhost/dir/file", "proj"),
  getParam("http://localhost:8080/App/sample?proj=1997", "proj")
);