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<.> 1. The arrow function
The arrow function provides a more concise function writing method. The appearance is clearer, and some of the main problems of the
keywords in the traditional functions are solved.
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Working principle:
Advantages:
<code class="language-javascript">// 传统函数 function add(a, b) { return a + b; } // 箭头函数 const add = (a, b) => a + b; console.log(add(5, 10)); // 输出:15</code>
Simple: reduced the model code.
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The font meal of the template is allowed to operate the string more easily by embedded expression and multi -line string.
Advantages:
Readability: No string connection.
<code class="language-javascript">const name = "MJ"; const message = `Hello, ${name}! Welcome to the world of JavaScript.`; console.log(message); // 输出:Hello, MJ! Welcome to the world of JavaScript.</code>Multi -line string:
You can easily create multi -line text without the need to transfer characters.
<code class="language-javascript">const poem = `Roses are red, Violets are blue, JavaScript is awesome, And so are you!`; console.log(poem);</code>
Certain code:
Extract only the required values.The default value:
The silent recognition value is assigned during deconstruction.
<code class="language-javascript">// 数组解构 const colors = ["red", "green", "blue"]; const [primary, secondary, tertiary] = colors; console.log(primary); // 输出:red // 对象解构 const user = { name: "MJ", age: 26 }; const { name, age } = user; console.log(name); // 输出:MJ</code>Conclusion
Arrow functions, templates, and solution assignments are the characteristics of JavaScript, which can significantly improve the productivity and code clarity of front -end developers. Mastering these characteristics can not only write clearer code, but also improve efficiency.
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