Yep – works in all loops. const myObject = { propA: ‘foo’, propB: ‘bar’ }; for (let propName in myObject) { console.log(propName); if (propName !== ‘propA’) { continue; } else if (propName === ‘propA’) { break; } } (By loops I mean for, for…in, for…of, while and do…while, not forEach, which is actually a function … Read more
Why use const and when to use let in for…of loops? If there are no assignments to the identifier within the loop body, it’s a matter of style whether you use let or const. Use const if you want the identifier within the loop body to be read-only (so that, for instance, if someone modifies … Read more
Check existing config Based on the current master branch, eslint-config-airbnb currently disables four syntax forms: ForInStatement ForOfStatement LabeledStatement WithStatement You can verify this or see if there are any differences by using ESLint’s –print-config CLI flag: $ eslint –print-config file.js ESLint will print out the config it would use to lint file.js, and you can … Read more
Use Array.prototype.keys: for (const index of [1, 2, 3, 4, 5].keys()) { console.log(index); } If you want to access both the key and the value, you can use Array.prototype.entries() with destructuring: for (const [index, value] of [1, 2, 3, 4, 5].entries()) { console.log(index, value); }