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showing results for - "check if function exists javascript"
Julie
07 Jun 2018
1//check if sayHello() function exists
2if (typeof sayHello === "function") { 
3    // This function exists
4}
5
source
Maria
16 Mar 2017
1if (typeof yourFunctionName == 'function') { 
2  yourFunctionName(); 
3}
Jacobo
19 Jun 2020
1if (typeof payment === "function")
2{
3  // Do something
4}
Christian
30 Apr 2020
1if (typeof sourceObj.someMethod === "function") { 
2    // you are safe using the method
3  	sourceObj.someMethod();
4}
Harper
15 Jan 2020
1How to check if function exists in JavaScript?
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