要在js中想要替換替換模板中的${}，可以使用字符串的replace()方法結(jié)合正則表達(dá)式或者函數(shù)來實現(xiàn)替換操作。

以下是兩種常見的替換方式： 使用正則表達(dá)式：

方法一：

const template = "Hello, ${name}! Today is ${day}.";
const data = {name: "John",day: "Monday"
};const result = template.replace(/\${(.*?)}/g, (match, key) => data[key]);
console.log(result);  // 輸出: Hello, John! Today is Monday.

方法二：

const template = "Hello, ${name}! Today is ${day}.";
const data = {name: "John",day: "Monday"
};const result = template.replace(/\${(.*?)}/g, (match, key) => {return data.hasOwnProperty(key) ? data[key] : match;
});
console.log(result);  // 輸出: Hello, John! Today is Monday.