JQuery basic notes and interview questions + JavaScript notes and interview questions (including answers)

Netease cloud 2021-01-22 13:44:09
jquery basic notes interview questions



JQuery Basic notes and interview questions


1. jQuery What is it? ?

2. Why use jQuery?

3. jQuery Entry function

1. jQuery And JavaScript Loading mode comparison

2. jQuery Other writing

3. solve $ Symbol conflict

1. Release $ Right to use

2. Custom access symbols

4. jQuery Core function

5. jQuery object

1. jQuery The nature of the object

6. jQuery Static methods

1. What is a static method

2. jQuery.holdReady()

3. each Method

4. map Method

5. trim Method

6. isWindow Method

7. isArray Method

8. isFunction Method

7. jQuery Selectors

1. Foundation selector

2. Hierarchy selector

3. Content filter selector

1. :empty

2. :parent

3. :contains(text)

4. :has(selector)

8. jQuery Attribute operation

1. Attributes and attribute nodes

1. What is an attribute ?

2. How to manipulate properties ?

3. What are attribute nodes ?

4. How to operate attribute nodes ?

5. What's the difference between attributes and attribute nodes ?

2. Property node method

1. attr Method

2. removeAttr Method

3. prop Method

4. removeProp Method

5. attr Methods and prop Method difference

9. jQuery Class operation

1. jQuery Class Class action

1. addClass

2. removeClass

3. toggleClass

2. jQuery Text value operations

1. html

2. text

3. val

3. jQuery CSS style

1. css Method

2. width Method

3. height Method

4. jQuery Element location

1. offset Method

2. position Method

5. jQuery scroll Method

1. scrollTop Method

2. scrollLeft Method

10. jQuery event

1. Event binding

2. Event unbundling

3. Event coordinates

4. Event Bubbling

1. What is event bubbling

2. Stop the event from bubbling

5. Default behavior

1. What is default behavior

2. Blocking default behavior

6. Auto trigger event

1. What is an auto trigger event

2. Auto trigger mode

7. Custom events

1. What is a custom event

2. Conditions for custom events

8. Event namespace

1. What is an event namespace

2. Conditions for adding event namespace

3. Note on event namespace ( Interview questions )

9. Event delegation

1. What is event delegation

2. The benefits of event delegation

3. jQuery Add an event delegate to

10. Move in and move out events

1. mouseenter/mouseleave

2. mouseover/mouseout

3. hover

11. jQuery Animation effect

1. Show , Hide animation

1. show

2. hide

3. toggle

4. Be careful

2. an , Put the animation away

1. slideDown

2. slideUp

3. slideToggle

3. Fade in , Fade out animation

1. fadeIn

2. fadeOut

3. fadeToggle

4. fadeTo

4. Custom animation

1. animate

5. Animation queue

6. Animation related methods

1. delay

2. stop

12. jQuery Document processing

1. Add a node

1. Internal insert

2. External insert

2. Delete node

3. Replacement node

4. Replication node

5. Wrapped node

6. Traversal node

13. jQuery Interview questions

1. Why use jQuery?jquery What are the benefits ?

2. jQuery What can be done ?

3. jQuery In the library $() What is it? ?

4. $(document).ready() What function is it ? Why use it ?

5. (document).ready() Methods and window.onload What's the difference? ?

6. jQuery in .get() Submit and .post() The difference between submissions

7. jQuery Which methods are available in to traverse nodes ?

8. $(this) and this The key word in jQuery What's the difference between ?

9. Use CDN load jQuery What are the main advantages of the library ?

10. How to use to get a complex data from the server ( object )?

11. What you should pay attention to when using selectors ?

12. There are selectors for which query nodes ?

13. jQuery How to handle caching ? ( To handle caching is to disable caching )

14. stay jquery Have you ever written a plug-in in , What are the benefits of plug-ins ? You've written those plug-ins ? It should pay attention to those ?

Because the answer part is too long , I won't show you one by one , If you want to get the interview information, you can pay attention to me , DMS from “ Information ” Free access to

JQuery Basic notes and interview questions +JavaScript Notes and interview questions ( With answers )


JQuery Basic notes and interview questions +JavaScript Notes and interview questions ( With answers )


JavaScript Notes and interview questions


1. First time to know javascript

1. JavaScript brief introduction

2. JavaScript characteristic

3. JavaScript The role of

4. first js sentence

The output characters “hello world”

5. js How to introduce

1. Header import (head tag )

2. Page (body tag )

3. Element events ( Tag attributes )

4. Introduce the outside JS file

6. js Output

1. Use the pop-up warning box

2. Direct write HTML file

3. Write to the console

4. Use innerHTML

7. js sentence

1. javascript sentence

2. javascript Code

3. JavaScript Case sensitive

4. according to HTML The execution order of the document flow

8. js Basic concepts

1. JavaScript All the keywords of :

2. JavaScript Identifier

3. JavaScript The constant

4. JavaScript The variable of

5. JavaScript Notes

2. Js Basic grammar

1. data type

1. character string

2. Escape character

3. Numbers

1. Integer data

2. Floating point data

4. Boolean

5. Array

6. object

7. NULL

8. Undefined

2. View data type

1. typeof

3. Operator

1. Arithmetic operator

2. Assignment operator

3. Comparison operator

4. Logical operators

5. Type operators

4. expression

1. Simple expressions

1. Arithmetic expressions

2. Logical expression

3. Binocular expression

2. Complex expressions

1. A combination of simple expressions

2. The order of precedence of an expression

3. Js function

1. Definition of function

1. How to define a function

2. Function name

3. Parameters ( Shape parameter )

2. Function call

3. The return value of the function

4. Function splitting

5. Scope of variable

1. Global variables

2. local variable

6. Inner functions and closures

1. Internal function

1. Regular functions

2. Array function

3. Date function

4. Mathematical functions (Math)

5. String function

2. Closure

7. Functions as arguments and callback functions

1. Function as parameter

2. Callback function

8. Recursive function

9. Function function

4. Js Process control

1. Sequential structure

2. Selection structure

1. if sentence

2. if ... else sentence

3. if ... else if ... else sentence

4. Multiple choice statements (switch)

3. Loop structure

1. for Follow the bad news

2. while loop

4. The continuation and termination of the procedure

1. break sentence

2. continue sentence

5. String object

1. Define string

1. Definition

2. Strings can store a series of characters

3. Use the index position to access each character in the string

4. The index of the string is from 0 Start

5. Add escape characters to the string to use quotation marks

6. length attribute

2. String manipulation

1. Character acquisition

1. charAt() Method

2. Direct index characters

2. The difference between the two ways

3. Find string

1. Match() Method

2. Search() Method

3. indexOf() Method

4. Replace string

1. replace()

2. The replacement of upper and lower case of English letters

1. toLowerCase()

2. toUpperCase()

5. String connection

1. concat() Connection string

2. “+” Connection string

6. Intercept character

1. Definition

2. Return value

6. Array objects

1. JS data type

1. Value type ( Basic types )

2. Reference type ( class )

3. Integers and floating-point numbers

1. Integers

2. Floating point numbers

2. Math object

3. Numerical operation

1. Take the maximum and the minimum

2. The value is rounded

3. The absolute value Math.abs()

4. Generation of random numbers Math.random(x)

5. Returns the square root of a number Math.sqrt(x)

6. Power operation Math.pow(x,y)

4. A string is converted to a number

1. Conversion function

2. Cast

3. utilize js Variable weak type conversion

5. Introduction of the array

1. Definition

2. The assignment of an array

3. Getting array elements

6. The length of the array

7. Insertion and deletion of array elements

1. unshift()

2. push()

3. shift()

4. pop()

8. Interception of array elements

1. slice()

9. Sorting and inversion of arrays

1. sort()

2. reverse() Method

10. Linking and transformation of arrays

1. concat()

2. join()

3. toString()

4. join() And tostring() The difference between

7. Time object

1. Time use scenarios

2. Basic concepts

1. The time zone

2. Time format

3. Time stamp

3. Definition of time object

1. new Date()

4. Turn the time object into a string

1. toString()

2. toUTCString()

3. toLocalString()

4. Differences among the three

5. Acquisition time

1. Get date

1. getFullYear()

2. getMonth()

3. getDate()

2. Get time, minutes, seconds

1. getHours()

2. getMinutes()

2. getMilliseconds()

3. Get week

1. getDay()

2. use switch

3. Using arrays

6. Setup time

1. Set the time object

1. Use the time string

2 . Time stamp

3. Get the current time

2. Set the date

1. setFullYear(year,month,day)

2. setMonth(month,day)

3. setDate(day)

3. Set time, minutes, seconds

1. setHours(hour,min,sec,millisec)

2. setMinutes(min,sec,millisec)

3. setSeconds(sec,millisec)

8. DOM object

1. Dom Object description

1. HTML DOM Trees :

2. What is? DOM?

3. HTML DOM yes :

4. Yes DOM Understanding of nodes

2. obtain dom object

1. getElementById()

2. getElementsByName()

3. Get related nodes

1. Access parent

1. parentNode()

2. Visit the sibling node

1. nextSibling

2. previousSibling

3. childNodes

4. operation DOM attribute 、HTML And the text

1. js Acquired html The content includes

2. adopt attribute Get and set property values

5. operation DOM Object's CSS

1. obtain css style

2. Set up css Value

6. establish DOM node

1. createElement()

2. createTextNode()

3. Create the HTML

7. Node operation

1. removeChild()

2. replaceChild

3. Replication node

9. Window Objects and document object

1. Window object

1. Window Object description

2. Window The opening and closing of windows

1. open()

2. close()

2. Returns the width and height of the document

1. innerheight

2. innerwidth

3. location Properties and methods of objects

1. Location object

2. Location Object properties

3. Location Object methods

4. document object

1. document Object description

10. Timer

1. A timer that executes once

1. setTimeout()

2. clearTimeout()

2. Repeated timer

1. setInterval()

2. clearInterval()

11. Js event

1. What is an event

1. What is an event

2. Classification of events

2. Mouse events

1. Mouse click event

2. Mouse in and out events

3. Keyboard events

1. onkeydown event

2. onkeypress event

3. onkeyup event

4. Form Events

1. onchange event :

2. onsubmit event

3. onfocus Events and onblur event

5. Browser Events

1. onload event

2. onresize event

Js Classic interview questions

1. Please describe cookies,sessionStorage and localStorage The difference between ?

2. Start with the user refreshing the page , once js In general, where do requests have cache processing ?

3. js How to get and set cookie?

4. You know HTTP Status code , Please feel free to introduce .

5. Talk about the understanding of website refactoring .

6. js Array weight removal .

7. Ajax What is it? ?Ajax The interaction model of ? The difference between synchronous and asynchronous ? How to solve cross domain problems ?

8. WEB Application is actively pushed from the server Data What are the ways to get to the client ?

9. Node.js The applicable scenarios of

10. Flash、Ajax Advantages and disadvantages of each , How to choose in use ?

11. What is elegant degradation and gradual enhancement ?

12. What operations can cause memory leaks ?

13. How to solve the problem of cross domain communication , Briefly describe the methods ?

14. Write at least 5 A front-end optimization method , And write the reasons .

15. ajax principle 、 How to refresh data and its advantages ?

16. What's the difference between event binding and normal events ,IE and DOM The difference between event flows .

17. javascript Local objects for , Built in and host objects .

18. Talk about this Understanding of the object .

19. new What do operators do ?

20. JSON Understanding ?

21. How to load asynchronously ?

22. A page from input URL To the page loading display complete , What happened in the process ?( The more detailed the process is, the better )

Because the answer part is too long , I won't show you one by one , If you want to get the interview information, you can pay attention to me , DMS from “ Information ” Free access to

JQuery Basic notes and interview questions +JavaScript Notes and interview questions ( With answers )


JQuery Basic notes and interview questions +JavaScript Notes and interview questions ( With answers )

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