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bindKey javascript Code Snippet in 2022

functionobjectadvanced

Last Updated: 25 September 2022

Creates a function that invokes the method at a given key of an object, optionally prepending any additional supplied parameters to the arguments.

  • Return a function that uses Function.prototype.apply() to bind context[fn] to context.
  • Use the spread operator (...) to prepend any additional supplied parameters to the arguments.
const bindKey = (context, fn, ...boundArgs) => (...args) => context[fn].apply(context, [...boundArgs, ...args]);
const freddy = { user: 'fred', greet: function(greeting, punctuation) { return greeting + ' ' + this.user + punctuation; } }; const freddyBound = bindKey(freddy, 'greet'); console.log(freddyBound('hi', '!')); // 'hi fred!'

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