function exists javascript

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showing results for - "function exists javascript"
Alexandra
25 Aug 2020
1//check if sayHello() function exists
2if (typeof sayHello === "function") { 
3    // This function exists
4}
5
source
Oona
08 Mar 2016
1if (typeof yourFunctionName == 'function') { 
2  yourFunctionName(); 
3}
Liah
27 Aug 2016
1if (typeof payment === "function")
2{
3  // Do something
4}
Raphael
06 Nov 2017
1if (typeof sourceObj.someMethod === "function") { 
2    // you are safe using the method
3  	sourceObj.someMethod();
4}
Yasmine
27 Sep 2016
1How to check if function exists in JavaScript?
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