Linked Questions
44 questions linked to/from How does this object method definition work without the "function" keyword?
27
votes
2
answers
4k
views
No colon after property name in object declaration, is it valid? [duplicate]
I entered this expression in the Firefox and Chrome Dev Console and I wonder why it is valid JavaScript:
var x = { a (b) {} };
console.log(x);
x is then set to an object with the property "a" ...
- 464
2
votes
3
answers
5k
views
Shorthand for defining function in JavaScript object [duplicate]
Accidentally I written a code like below,
var x = {hai:10,test(){ alert("I am alive")}};
x.test(); //alerting the value
It is working fine and I wonder how this code is working? since it was ...
- 67.2k
0
votes
2
answers
623
views
Braces as an ES6 function declaration statement? [duplicate]
Found this in a tutorial I was going over.
It's ES6.
I'm just not sure whats exactly going on. Namely , the way the function(?) is being declared with the array. Where is the colon that declares it ...
- 2,175
2
votes
1
answer
737
views
created() {} vs created: function() {} [duplicate]
I've seen some people use
created: function() {
// code
}
and also
created () {
// code
}
and then a warning in the Vue docs to not do this
created: () => {
// code
}
I understand that ...
- 2,447
0
votes
1
answer
517
views
Does Vue Need The Function Keyword in Computed Properties and Methods? [duplicate]
I see computed properties and methods in the Vue docs like this:
export default {
computed: {
foo: function() { return 'foo'; }
},
methods: {
bar: function(x) { return 'bar ' + x; }
}
...
- 38.9k
0
votes
1
answer
420
views
Weird function definition syntax in JS [duplicate]
I've discovered this piece of code in the Meteor.js tutorial. It's ES2015:
Meteor.methods({
'tasks.insert'(text) {
check(text, String);
// Make sure the user is logged in before inserting ...
- 6,007
3
votes
2
answers
98
views
What is this 'method-like' syntax in JS object literal [duplicate]
Use ES6 class sugar, we can define function this way:
class Foo {
constructor(props) {}
...
myFn() {}
}
and in JS object literal, we can define getters and setters like this:
foo = {
...
- 4,879
4
votes
2
answers
102
views
Why does this code run in javascript ? Function inside an object [duplicate]
When i type this code in javascript console, this does not through an error, instead it runs.
var a = {
b:"123",
update(){
console.log("hello");
}
}
The problem is, update() does not have ...
- 2,286
2
votes
2
answers
80
views
Different ways of declaring a function within a variable [duplicate]
I'm curious about the following two methods of declaring functions within a variable in Javascript. What's the difference between the two function declarations below? Both seem to work. Are there any ...
- 45
1
vote
1
answer
301
views
Vue, do I need the colon for all my functions? [duplicate]
In the Vue documentation, the syntax myFunc: function(){...} is often used, for computed or methods. In these places, myFunc(){...} also works. Is there any difference? Is there any reason not to use ...
- 29.2k
0
votes
2
answers
86
views
Is this a computed method name in a block declaration - or is it a typo? [duplicate]
I am unable to understand this piece of JavaScript:
Template.welcome.events({
'submit form' (event, template) {
event.preventDefault()
}
})
Is submit form the name of a method, with ...
- 5,407
3
votes
1
answer
138
views
Javascript syntax []() and ()() [duplicate]
I'm having trouble understanding these javascript syntaxes. In the block of code below, on the second line. The square bracket is quickly followed by a round bracket or parentheses which I suspected ...
- 769
2
votes
3
answers
57
views
Syntax for object methods [duplicate]
I have always defined methods in objects like this:
{
a: function(par1, par2) { },
}
But recently I see this (which I assume is equivalent, but I am not sure):
{
a(par1, par2) { },
}
When has ...
- 45k
0
votes
3
answers
189
views
Are the values defined in this JavaScript object actually functions? [duplicate]
I'm new to JavaScript, and after reading "JavaScript The Good Parts" I wanted to code something for fun. I stubled upon this code snipped that I can't understand:
const actions = {
say(sessionId, ...
- 1
3
votes
1
answer
70
views
Is it valid to define function in javascript object without a property name [duplicate]
I had some issues to get a website working in Internet Explorer (IE9) and I found that we have defined a function in a javascript object in the following way:
var test = {
a : function(){...
