标签：des style blog http ar io os sp for
https://github.com/h5bp/Front-end-Developer-Interview-Questions#contributors
1. 一般性问题
- What did you learn yesterday/this week?
- What excites or interests you about coding?
- What UI, Security, Performance, SEO, Maintainability or Technology considerations do you make while building a web application or site?
- Talk about your preferred development environment. (OS, Editor or IDE, Browsers, Tools etc.)
- Which version control systems are you familiar with?
- Can you describe your workflow when you create a web page?
- If you have 5 different stylesheets, how would you best integrate them into the site?
- Can you describe the difference between progressive enhancement and graceful degradation?
- Bonus points for describing feature detection
- How would you optimize a websites assets/resources?
- Looking for a number of solutions which can include:
- File concatenation
- File minification
- CDN Hosted
- Caching
- etc.
- Traditionally, why has it been better to serve site assets from multiple domains?
- How many resources will a browser download from a given domain at a time?
- What are the exceptions?
- Name 3 ways to decrease page load. (perceived or actual load time)
- If you jumped on a project and they used tabs and you used spaces, what would you do?
- Suggest the project utilize something like EditorConfig (http://editorconfig.org)
- Conform to the conventions (stay consistent)
issue :retab! command
- Write a simple slideshow page
- Bonus points if it does not use JS.
- What tools do you use to test your code‘s performance?
- Profiler, JSPerf, Dromaeo
- If you could master one technology this year, what would it be?
- What are the differences between Long-Polling, Websockets and SSE?
- Explain the importance of standards and standards bodies.
- What is FOUC? How do you avoid FOUC?
- Do your best to describe the process from the time you type in a website‘s URL to it finishing loading on your screen.
2. HTML相关
- What‘s a
doctype do?
- What‘s the difference between standards mode and quirks mode?
- What are the limitations when serving XHTML pages?
- Are there any problems with serving pages as
application/xhtml+xml?
- How do you serve a page with content in multiple languages?
- What kind of things must you be wary of when design or developing for multilingual sites?
- What are
data- attributes good for?
- Consider HTML5 as an open web platform. What are the building blocks of HTML5?
- Describe the difference between cookies, sessionStorage and localStorage.
- Can you explain the difference between
GET and POST?
3. CSS相关
- What is the difference between classes and IDs in CSS?
- Describe what a "reset" CSS file does and how it‘s useful.
- Bonus for pointing out the downsides of a "reset", and/or mentioning "normalize" as a better alternative.
- Describe Floats and how they work.
- Describe z-index and how stacking context is formed.
- What are the various clearing techniques and which is appropriate for what context?
- Explain CSS sprites, and how you would implement them on a page or site.
- What are your favourite image replacement techniques and which do you use when?
- CSS property hacks, conditionally included .css files, or... something else?
- How do you serve your pages for feature-constrained browsers?
- What techniques/processes do you use?
- What are the different ways to visually hide content (and make it available only for screen readers)?
- Have you ever used a grid system, and if so, what do you prefer?
- Have you used or implemented media queries or mobile specific layouts/CSS?
- Any familiarity with styling SVG?
- How do you optimize your webpages for print?
- What are some of the "gotchas" for writing efficient CSS?
- What are the advantages/disadvantages of using CSS preprocessors? (SASS, Compass, Stylus, LESS)
- If so, describe what you like and dislike about the CSS preprocessors you have used.
- How would you implement a web design comp that uses non-standard fonts?
- Webfonts (font services like: Google Webfonts, Typekit etc.)
- Explain how a browser determines what elements match a CSS selector?
- Explain your understanding of the box model and how you would tell the browser in CSS to render your layout in different box models.
- What does
* { box-sizing: border-box; } do? What are its advantages?
- List as many values for the display property that you can remember.
- What‘s the difference between inline and inline-block?
- What‘s the difference between a relative, fixed, absolute and statically positioned element?
- What existing CSS frameworks have you used locally, or in production? (Bootstrap, PureCSS, Foundation etc.)
- If so, which ones? If you could, how would you change/improve them?
- Have you played around with the new CSS Flexbox or Grid specs?
- How is responsive design different from adaptive design?
- Have you ever worked with retina graphics? If so, when and what techniques did you use?
4. JS 问题
- Explain event delegation
- Explain how
this works in JavaScript
- Explain how prototypal inheritance works
- How do you go about testing your JavaScript?
- AMD vs. CommonJS?
- Explain why the following doesn‘t work as an IIFE:
function foo(){ }();.
- What needs to be changed to properly make it an IIFE?
- What‘s the difference between a variable that is:
null, undefined or undeclared?
- How would you go about checking for any of these states?
- What is a closure, and how/why would you use one?
- What‘s a typical use case for anonymous functions?
- How do you organize your code? (module pattern, classical inheritance?)
- What‘s the difference between host objects and native objects?
- Difference between:
function Person(){}, var person = Person(), and var person = new Person()?
- What‘s the difference between
.call and .apply?
- explain
Function.prototype.bind?
- When do you optimize your code?
- When would you use
document.write()?
- Most generated ads still utilize
document.write() although its use is frowned upon
- What‘s the difference between feature detection, feature inference, and using the UA string
- Explain AJAX in as much detail as possible
- Explain how JSONP works (and how it‘s not really AJAX)
- Have you ever used JavaScript templating?
- If so, what libraries have you used? (Mustache.js, Handlebars etc.)
- Explain "hoisting".
- Describe event bubbling.
- What‘s the difference between an "attribute" and a "property"?
- Why is extending built in JavaScript objects not a good idea?
- Difference between document load event and document ready event?
- What is the difference between
== and ===?
- Explain the same-origin policy with regards to JavaScript.
- Make this work:
duplicate([1,2,3,4,5]); // [1,2,3,4,5,1,2,3,4,5]
- Why is it called a Ternary expression, what does the word "Ternary" indicate?
- What is
"use strict";? what are the advantages and disadvantages to using it?
- Create a for loop that iterates up to
100 while outputting "fizz" at multiples of 3, "buzz" at multiples of 5 and "fizzbuzz" at multiples of 3 and 5
6. jQuery 相关
- Explain "chaining".
- Explain "deferreds".
- What are some jQuery specific optimizations you can implement?
- What does
.end() do?
- Name 4 different values you can pass to the jQuery method.
- Selector (string), HTML (string), Callback (function), HTMLElement, object, array, element array, jQuery Object etc.
- What is the difference between
.get(), [], and .eq()?
7. 代码
Question: How would you make this work?
add(2, 5); // 7
add(2)(5); // 7
Question: What value is returned from the following statement?
"i‘m a lasagna hog".split("").reverse().join("");
Answer: "goh angasal a m‘i"
Question: What is the value of window.foo?
( window.foo || ( window.foo = "bar" ) );
Answer: "bar" (only if window.foo was falsey otherwise it will retain its value)
Question: What is the outcome of the two alerts below?
var foo = "Hello";
(function() {
var bar = " World";
alert(foo + bar);
})();
alert(foo + bar);
Answer: "Hello World" & ReferenceError: bar is not defined
Question: What is the value of foo.length?
var foo = [];
foo.push(1);
foo.push(2);
Answer: 2
8. 开放式问题
- What‘s a cool thing you‘ve coded recently? What‘s something you‘ve built that you‘re proud of?
- What are some things you like about the developer tools you use?
- Do you have any pet projects? What kind?
- What‘s your favorite feature of Internet Explorer?
9. 其他
【前端基础】基础知识
标签：des style blog http ar io os sp for
原文地址：http://www.cnblogs.com/huxiaoyun90/p/4171280.html
