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Es6 concatenation string there are two ways to write: 1, in the template string using "${var}" to concatenate characters, written as "`${string 1} string 2`", "${}" can be put into the JS expression; 2, the use of the "+" operator, write "string 1 + string 2", the use of ternary expression, the need to use parentheses.

The operating environment of this tutorial: windows7 system, ECMAScript version 6, Dell G3 computer.

ES6 string concatenation

Strings can be concatenated in the following ways:

1. Use ${var} to concatenate characters in the template string

Const name = 'Xiaoming'; const score = 59 leading result =''; if (score > 60) {result = `$ {name} failed in the examination`;} else {result = `$ {name} failed in the examination`;} console.log (result)

Description:

ES6 has added ``(back quotation marks) to declare that the string wrapped in backquotes is a template string template string can be displayed on multiple lines and variable insertion can be run you can use any valid JavaScript expression such as `$ {2 * 3} `or `$ {foo ()}` in interpolation.

In es6, you can put JS expressions in ${}, perform operations, and reference object properties.

Mode 2 + operator concatenation characters

Note that when using ternary expressions, you need to enclose them in parentheses

Const name = 'Xiao Ming'; const score = 61'; if (score > 60) {result = name+' passed';} else {result = name+' passed';} console.log (result)

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