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+# ts基础
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+## `interface`接口定义
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+1. 用来更好的定义数据集合,为每一项进行准确的定义
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+2. 用法
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+ 1. 用`interface`定义必须包含`label`属性,并且值类型为`string`
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+ ```typescript
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+
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+ interface LabelledValue {
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+ label: string;
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+ }
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+
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+ function printLabel(labelledObj: LabelledValue) {
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+ console.log(labelledObj.label);
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+ }
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+
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+ let myObj = {size: 10, label: "Size 10 Object"};
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+ printLabel(myObj);
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+
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+ ```
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+ 3.
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