The front-end {{}} syntax judges whether the value is null or undefined (implementation using the ternary operator)

Mobile 2023-08-02 15:40:40 views: null

Article directory

Application Scenario
grammar
Practical application scenarios

Application Scenario

I assigned the value of data.value in other places, here is the echo, to judge whether it is or null

grammar

{ { 变量名 !== null ? 要赋的值 : 条件都不满足时要赋的值 }}

Practical application scenarios

{
    
    {
    
     data.value !== null ? data.value : '-' }}

Guess you like

Origin blog.csdn.net/xiaohua616/article/details/131835586

The front-end {{}} syntax judges whether the value is null or undefined (implementation using the ternary operator)

js judges whether it is null, undefined, NaN, empty string or empty object

JS is determined whether a valid value is null or undefined

Absolute value with ternary operator

Using the ternary operator

JS judges null value

Ternary operator for Bigdecimal null validation

Precautions for using PHP ternary operator

Using Overlay in Flutter to pass in context prompt: Null check operator used on a null value (null check operator used on a null value)

[TCL] Detailed syntax explanation of ternary operator in expr

Mybatis judges whether int is empty as long as !=null

Determining whether the value of the field is null

Ternary operator

C# Question Mark Operator Nullable, Ternary and Null Combination

Ternary operator reports null pointer, JDK automatically unboxes

Use ternary operator to find the best value of three numbers

Java ternary operator datatype conversion based on the first value?

C++ judges whether the key value in the map exists

Python judges whether the value a is in the list, and gives the position of the element in the list list

JS judges whether an object or an array contains a certain attribute or a certain value

[Dry goods] Java judges whether the value of some attributes in an object is empty

undefined null various value comparisons (interview questions)

Is using Optional.ofNullable as a replacement for the ternary operator a good practice?

SQL judges whether "exists", is still using count operation?

【Vue】Cannot set reactive property on undefined,null,or primitive value:undefined

jq judges that the object contains a field whose value is null or an empty string

Kotlin judges null and compares let Boolean value Boolean

Whether to output fields whose value is null

How to judge whether a value is Null in JS

Recommended

Ranking

#2019110700005

What materials and procedures are required for patent transfer

What is the blockchain Ethereum triplet state root transaction root receipt root

Front-end study notes 04 --- About the insertion of html pictures and videos

Documents required for the filing of WeChat Mini Programs in special industries, the filing process of WeChat Mini Programs in special industries, how to file WeChat Mini Programs in special industries

2017 Qingdao-site tournament I The Squared Mosquito Coil

[BZOJ3165][HEOI2013]Segment (line segment tree without marking)

Kettle series: KettleEasyExpand, an open source Kettle universal plugin by Ma Jinju

The latest tutorial on making framework for iOS

DAX Section 6: Statistical Functions

Daily

2024-05-14(9)

2024-05-13(8)

2024-05-12(28)

2024-05-11(32)

2024-05-10(34)

2024-05-09(32)

2024-05-08(18)

2024-05-07(34)

2024-05-06(6)

2024-05-05(0)