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JS: 使用模板字面量作为参数的函数
异乡客
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  1. // !!使用模板字面量作为参数的函数
  2. // 模板函数:第一个参数是字面量组成的数字,第二个参数起,是字面量中的插值列表
  3. console.log(`${0 < 20 ? `大于` : `小于`}`);
  4. // 第一步:申明模板函数
  5. function total(strings,num,price) {
  6. console.log(strings);
  7. console.log(num,price);
  8. let res = `${strings[0]}${num}${strings[1]}${price}${strings[2]}${num * price} ${strings[3]}`;
  9. console.log(res);
  10. return res;
  11. }
  12. let num = 10;
  13. let price =20;
  14. // 第二步:调用模板函数
  15. // total`数量${num}单价${price}的总金额:${num * price}元`;
  16. console.log(total`数量${num}单价${price}的总金额:${num * price}元`);
  17. // !!模板函数的优化,使用...rest将插值进行合并
  18. // 第一步...rest 将插值合并
  19. function sum(strings,...args){
  20. console.log(strings);
  21. console.log(args);
  22. console.log(`[${args.join()}]之和是:${args.reduce((a,c)=>a+c)}`);
  23. }
  24. // 第二部:调用
  25. sum`计算多个数之和:${1}${2}${3}${4}${5}${6}${7}`;
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