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How to get the url parameter values in Salesforce Custom Button using JavaScript?

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How to get the url parameter values in Salesforce Custom Button using JavaScript?

its possible to using the pure Javascript itself:

Generic Method:

function getParameterByName(name, url) {
if (!url) {
url = window.location.href;
}
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}

How to page the value in the above method of getParameterByName:

// query string: ?foo=lorem&bar=&baz
var foo = getParameterByName('foo'); // "lorem"
var bar = getParameterByName('bar'); // "" (present with empty value)
var baz = getParameterByName('baz'); // "" (present with no value)
var qux = getParameterByName('qux'); // null (absent)

Note: If a parameter is present several times (?foo=lorem&foo=ipsum), you will get the first value (lorem).

Same code, we can use it in the Salesforce Custom button like below:

{!REQUIRESCRIPT(“/soap/ajax/25.0/connection.js”)}

function getParameterByName(name, url) {
if (!url) {
url = window.location.href;
}
name = name.replace(/[\[\]]/g, “\\$&”);
var regex = new RegExp(“[?&]” + name + “(=([^&#]*)|&|#|$)”),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return ”;
return decodeURIComponent(results[2].replace(/\+/g, ” “));
}

var foo = getParameterByName(‘sid’);
alert(foo);
window.location = “apex/ProductsDepedencyList?Id=foo “;

 

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