javascript

javascript

dz / javascript

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things related to the javascript programming language

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js_questions
content Front End Interview: JavaScript Questions
children simple_rules_to_this (found via), how_event_delegation_works (found via)
hyperlink https://www.frontendinterviewhandbook.com/javascript-questions
location knowledge/javascript.dz:4

how_event_delegation_works
content how event delegation works
parents js_questions
hyperlink https://davidwalsh.name/event-delegate
location knowledge/javascript.dz:8

simple_rules_to_this
content The Simple Rules to "this" in JavaScript
parents js_questions
hyperlink https://codeburst.io/the-simple-rules-to-this-in-javascript-35d97f31bde3
location knowledge/javascript.dz:14

dom_event_delegation_stack_overflow
content Stack overflow: what is event delegation?
hyperlink https://stackoverflow.com/questions/1687296/what-is-dom-event-delegation
location knowledge/javascript.dz:20

js_objects
content JavaScript Objects: Inherited a Mess
hyperlink https://davidwalsh.name/javascript-objects
location knowledge/javascript.dz:24

the_core
content JavaScript: The Core
hyperlink http://dmitrysoshnikov.com/ecmascript/javascript-the-core/
location knowledge/javascript.dz:28

mdn_prototype_chain
content Inheritance and the Prototype change
children instanceof (checks prototype chain)
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain
location knowledge/javascript.dz:32

IIFE
content Immediately Invoked Function Expression
hyperlink https://en.wikipedia.org/wiki/Immediately_invoked_function_expression
flashcard (front) What is an IIFE?
flashcard (back) An Immediately Invoked Function Expression, or IIFE, is a programming language idiom which produces a lexical scope using function scoping. Example =(function () { })();=. It was a popular way to do modular programming in JS before ES modules and CommonJS.
location knowledge/javascript.dz:36

this
content this
flashcard (front) explain "this" in JavaScript
flashcard (back) 1. new keyword used: brand new object. 2. apply/call/bind: object passed in as argument. 3. obj.method(): object that function is property of 4. free function invocation: global object. window in the browser, undefined in strict mode. 5. multiple rules apply: higher rule wins. 6. arrow function in ES2015: ignore previous rules, use encapsulating scope.
location knowledge/javascript.dz:46

coercion
content coercion: an automatic conversion of values from one data type to another. Ex: having 0 coerce itself to be false.
children python/boolean_value_coercion, type_coercion_mdn
parents truthiness
flashcard (front) What is coercion in javascript?
flashcard (back) An automatic conversion of values from one data type to another. (ex: 0 to false)
location knowledge/javascript.dz:58

truthiness
content truthiness: When value is considered true when encountered in a boolean context.
children coercion (A value is said to be coerced to a boolean value)
hyperlink https://developer.mozilla.org/en-US/docs/Glossary/Truthy
location knowledge/javascript.dz:66

type_coercion_mdn
content MDN: type coercion
parents coercion
hyperlink https://developer.mozilla.org/en-US/docs/Glossary/Type_coercion
location knowledge/javascript.dz:74

instanceof
content instanceof: tests to see if the prototype property of a constructor appears anywhere in the prototype chain of an object.
parents mdn_prototype_chain
flashcard (front) what does instanceof do?
flashcard (back) instanceof is a javascript operator that checks to see if a prototype property exists anywhere in the prototype chain of an object
location knowledge/javascript.dz:79

rest_parameter
content Rest Parameter: syntax that allows a function to accept an indefinite number of arguments as an array, providing a way to represent variadic functions in javascript. ex: =function sum(...theArgs)=
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters
flashcard (front) What are rest parameters?
flashcard (back) Rest parameter syntax in JS allows for variadic functions to be represented as an array. Ex: =function sum(..theArgs)=.
location knowledge/javascript.dz:90

template_literals
content Template Literals: literals delimited with backticks (`). used for multi-line strings, string interpolation with embedded expressions, and special constructs called tagged templates.
children tagged_templates (template literals are used with tagged templates)
parents webdev/typescript/template_literal_types
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals
flashcard (front) What are template literals in javascript?
flashcard (back) Template literals are literals denoted with backtick ('`'), and allow for multi-line strings, string interpolation with embedded expressions, and special constructs called tagged templates.
location knowledge/javascript.dz:100

tagged_templates
content tagged templates
parents template_literals
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#tagged_templates
location knowledge/javascript.dz:112

await
content The await operator is used to wait for a Promise and get its fulfillment value. It can only be used inside an async function or at the top level of a module.
parents rust/await
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await
flashcard (front) what does the 'await' keyword do?
flashcard (back) The await keyword is an operator that is used to wait for a promise and get its fulfillment value. It can only be used inside an async function or at the top level of a module.
location knowledge/javascript.dz:118

static
content Static: defines a method or field for a class, or a static initialization block. They are accessed on the class itself, rather than an instance of the class.
children static_initialization_blocks
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/static
location knowledge/javascript.dz:129

static_initialization_blocks
content static initialization blocks: contains statements tobe evaluated during class initialization
parents static
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks
location knowledge/javascript.dz:135

class_expression
content class expression
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/class
location knowledge/javascript.dz:141

bind
content bind: method of Function instances creates a new function that, when called, calls this function with its this keyword set to the provided value, and a given sequence of arguments preceding any provided when the new function is called.
parents webdev/nextjs/dashboard_app_pass_id_server_action
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
location knowledge/javascript.dz:145

error
content Error Object
parents webdev/nextjs/learn_dashboard_app/13_handling_errors
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error
location knowledge/javascript.dz:153

regex
content Regex Reference
children regex/regexp, regex/lookahead_assertion
parents webdev/nextjs/matcher
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions
location knowledge/javascript.dz:157

bcrypt
content bcrypt package
children bcrypt/source
parents cryptography/bcrypt, webdev/nextjs/learn_dashboard_app/15_adding_authentication
hyperlink https://www.npmjs.com/package/bcrypt
location knowledge/javascript.dz:171

spread_syntax
content spread syntax: (...) syntax allows an iterable, such as an array or string, to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected.
parents cryptography/bcrypt, python/unpacking_argument_lists
hyperlink https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax
flashcard (front) What is spread syntax?
flashcard (back) Spread syntax (...) allows things like arrays to be expanded in functions where arguments are expected.
location knowledge/javascript.dz:175

node-gyp
content node-gyp: native addon build tool
parents bcrypt/source
hyperlink https://www.npmjs.com/package/node-gyp/v/3.8.0
location knowledge/javascript.dz:193

import_js_module_html
content Import javascript as JS module: <script src="main.js" type="module"></script>
parents webdev/html/elements/script/type, webdev/html/elements/script
remarks Usually put in
location knowledge/javascript.dz:199

webapi
content Web APIs
children webapi/HTML_DOM
hyperlink https://developer.mozilla.org/en-US/docs/Web/API
location knowledge/javascript.dz:203