如何在模板字符串文字中的变量内部编写变量？

Question

log(`${chalk.magenta(' LAUNCH_COMMAND')} ${chalk.green('npm run: ')} ${chalk.red('${LAUNCH_COMMAND}')}` );

这里是问题部分：${chalk.red('${LAUNCH_COMMAND}')}

LAUNCH_COMMAND 是 'production' 或 'development'。但是它在另一个 ${}.

里面

Answer 1

Demo

只需使用模板字符串文字中嵌套变量的变量名

`${chalk.red(LAUNCH_COMMAND)}` // for nested sting literal just use the variable name

const LAUNCH_COMMAND = 'hi';
console.log(`${chalk.magenta('  LAUNCH_COMMAND')} ${chalk.green('npm run: ')} ${chalk.red(LAUNCH_COMMAND)}` );

Answer 2

不要用引号将变量包含在字符串文字中。

log(`${chalk.magenta(  LAUNCH_COMMAND)} ${chalk.green(npm run: )} ${chalk.red(LAUNCH_COMMAND})` );

^ 假设应该可以工作，但我不清楚您为什么要编写这样的字符串背后的上下文。我假设它是某种动态输出。

var b = "Cats"
var c = "Dogs"

function concat(one, two) {

  return `${one} and ${two}`;

}

function compare(one, two) {

  var ans = one == two ? 'Are the same' : 'Are not the same';
  return ans;

}

console.log(`${concat(b, c)} - ${compare(b, c)}`);

如何在模板字符串文字中的变量内部编写变量？

How to write Variable inside of Variable in Template String literal?

javascript

object-literal

node.js

template-strings