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programmieren:javascript:js_function_exists [2021/03/16 09:02] jgehrkeprogrammieren:javascript:js_function_exists [2021/03/16 09:37] jgehrke
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 </code> </code>
  
-Verändert nach folgender Quelle: [[https://stackoverflow.com/questions/1042138/how-to-check-if-function-exists-in-javascript|Stackoverflow Beitrag(1)]], [[https://stackoverflow.com/questions/8592047/check-if-a-function-exists-with-its-name-in-a-string|Stackoverflow Beitrag(2)]] und [[https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Array/includes|MDN » array.includes()]]+Verändert nach folgender Quelle: [[https://stackoverflow.com/questions/1042138/how-to-check-if-function-exists-in-javascript|Stackoverflow Beitrag (1)]], [[https://stackoverflow.com/questions/8592047/check-if-a-function-exists-with-its-name-in-a-string|Stackoverflow Beitrag (2)]] und [[https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Array/includes|MDN » array.includes()]]
  
 +**Alternative wie es underscore.js macht**
 +Dieser Code ist auch gut, hat jedoch den Nachteil, das ''obj'' existieren muss, ansonsten gibt es einen Fehler.
 +
 +<code javascript>
 +is_function = function( obj ) {
 +  return !!(obj && obj.constructor && obj.call && obj.apply);
 +};
 +</code>
 +
 +Quelle: [[https://stackoverflow.com/questions/5999998/check-if-a-variable-is-of-function-type|Stackoverflow Beitrag (3)]]

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