vant components

packages/quantity/CHANGELOG.md

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+## 0.0.2 (2017-01-20)
+
+* 改了bug A
+* 加了功能B
+
+## 0.0.1 (2017-01-10)
+
+* 第一版

packages/quantity/README.md

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+# @youzan/<%= name %>
+
+!!! 请在此处填写你的文档最简单描述 !!!
+
+[![version][version-image]][download-url]
+[![download][download-image]][download-url]
+
+[version-image]: http://npm.qima-inc.com/badge/v/@youzan/<%= name %>.svg?style=flat-square
+[download-image]: http://npm.qima-inc.com/badge/d/@youzan/<%= name %>.svg?style=flat-square
+[download-url]: http://npm.qima-inc.com/package/@youzan/<%= name %>
+
+## Demo
+
+## Usage
+
+## API
+
+| 参数       | 说明      | 类型       | 默认值       | 可选值       |
+|-----------|-----------|-----------|-------------|-------------|
+| className | 自定义额外类名 | string  | ''          | ''          |
+
+
+
+
+## License
+[MIT](https://opensource.org/licenses/MIT)

packages/quantity/index.js

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+import Quantity from './src/quantity';
+
+export default Quantity;

packages/quantity/package.json

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+{
+  "name": "<%= name %>",
+  "version": "<%= version %>",
+  "description": "<%= description %>",
+  "main": "./lib/index.js",
+  "author": "<%= author %>",
+  "license": "<%= license %>",
+  "devDependencies": {},
+  "dependencies": {}
+}

packages/quantity/src/quantity.vue

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+<template>
+  <div class="van-quantity">
+    <button
+      @click="handleChange('minus')"
+      class="van-quantity__stepper van-quantity__minus"
+      :class="{
+        'van-quantity__minus--disabled': isMinusDisabled
+      }">
+    </button>
+    <input
+      type="text"
+      class="van-quantity__input"
+      :value="currentValue"
+      @input="handleInputChange"
+      :disabled="disabled">
+    <button
+      @click="handleChange('plus')"
+      class="van-quantity__stepper van-quantity__plus"
+      :class="{
+        'van-quantity__plus--disabled': isPlusDisabled
+      }">
+    </button>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'van-quantity',
+
+  props: {
+    min: {
+      type: [String, Number],
+      default: 1
+    },
+    max: {
+      type: [String, Number],
+      default: Infinity
+    },
+    value: {},
+    step: {
+      type: [String, Number],
+      default: 1
+    },
+    disabled: Boolean,
+    defaultValue: {
+      type: [String, Number],
+      default: 1
+    }
+  },
+
+  data() {
+    let value = this.value ? +this.value : +this.defaultValue;
+    const correctedValue = this.correctValue(value);
+    if (value !== correctedValue) {
+      value = correctedValue;
+      this.$emit('input', value);
+    }
+    return {
+      currentValue: value
+    };
+  },
+
+  computed: {
+    isMinusDisabled() {
+      const min = +this.min;
+      const step = +this.step;
+      const currentValue = +this.currentValue;
+      return min === currentValue || (currentValue - step) < min || this.disabled;
+    },
+    isPlusDisabled() {
+      const max = +this.max;
+      const step = +this.step;
+      const currentValue = +this.currentValue;
+      return max === currentValue || (currentValue + step) > max || this.disabled;
+    }
+  },
+
+  watch: {
+    currentValue(val) {
+      this.$emit('input', val);
+      this.$emit('change', val);
+    },
+    value(val) {
+      val = this.correctValue(+val);
+      if (val !== this.currentValue) {
+        this.currentValue = val;
+      }
+    }
+  },
+
+  methods: {
+    // 纠正value值
+    correctValue(value) {
+      value = Math.max(this.min, value);
+      value = Math.min(this.max, value);
+      return value;
+    },
+    handleInputChange(event) {
+      const val = +event.target.value;
+
+      this.currentValue = this.correctValue(val);
+    },
+    handleChange(type) {
+      if ((this.isMinusDisabled && type === 'minus') || (this.isPlusDisabled && type === 'plus')) {
+        this.$emit('overlimit', type);
+        return;
+      }
+
+      const step = +this.step;
+      const currentValue = +this.currentValue;
+      this.currentValue = type === 'minus' ? (currentValue - step) : (currentValue + step);
+    }
+  }
+};
+</script>