Function definition: Difference between revisions

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 =={{header|JavaScript}}==
+===ES1-*===
-Using a '''function declaration'''.
+Function Declaration
-<lang javascript>function multiply(a,b) { return a*b }</lang>
+<lang javascript>function multiply(a, b) {
+  return a*b;
+}</lang>
+===ES3-*===
-The same function can be defined using a '''function expression''' where you express a function as a value of a variable.
+Function Expression
-<lang javascript>var multiply = function (a, b) {
+<lang javascript>var multiply = function(a, b) {
     return a * b;
+};</lang>
+Named Function Expression
+<lang javascript>var multiply = function multiply(a, b) {
+    return a * b;
+};</lang>
+Method Definition
+<lang javascript>var o = {
+  multiply: function(a, b) {
+    return a * b;
+  }
+};</lang>
+===ES5-*===
+Accessors
+<lang javascript>var o = {
+  get foo() {
+    return 1;
+  },
+  set bar(value) {
+    // do things with value
+  }
+};</lang>
+===ES6-*===
+Arrow Function
+<lang javascript>var multiply = (a, b) => a * b;
+var multiply = (a, b) => { return a * b };
+</lang>
+Concise Body Method Definition
+<lang javascript>var o = {
+  multiply(a, b) {
+    return a * b;
+  }
 };</lang>