<!-- 如果此處的兩個鼠標事件不生效，可以在mouseenter后面添加.native后綴 -->
<div class="left-btn"
? ? ?@click="saveTemplate()"
? ? ?@mouseenter="changeImageSrc(1, 'hover')"
? ? ?@mouseleave="changeImageSrc(1, '')">
? <img :src="saveTemplateSrc"
? ? ? ?class="left-btn-img"
? ? ? ?alt="">
? <span class="left-btn-text">保存模板</span>
</div>
<div class="left-btn"
? ? ?@click="deleteSelectStock()"
? ? ?@mouseenter="changeImageSrc(2, 'hover')"
? ? ?@mouseleave="changeImageSrc(2, '')">
? <img :src="deleteSelectStockSrc"
? ? ? ?class="left-btn-img"
? ? ? ?alt="">
? <span class="left-btn-text">刪除選中行</span>
</div>
<div class="left-btn"
? ? ?@click="deleteTableData()"
? ? ?@mouseenter="changeImageSrc(3, 'hover')"
? ? ?@mouseleave="changeImageSrc(3, '')">
? <img :src="deleteTableDataSrc"
? ? ? ?class="left-btn-img"
? ? ? ?alt="">
? <span class="left-btn-text">清空當前表格</span>
</div>

// 在data中先定義圖片的初始src
saveTemplateSrc: require("@/assets/dataBrowser/saveTemplate.png"),
deleteSelectStockSrc: require("@/assets/dataBrowser/deleteSelectedRow.png"),
deleteTableDataSrc: require("@/assets/dataBrowser/clearCurrentList.png")
?
// 在methods中綁定鼠標懸浮事件
changeImageSrc (key, way) {
? let tempStr = way === 'hover' ? 'Hover' : ''
? switch (key) {
? ? case 1:
? ? ? this.saveTemplateSrc = require(`@/assets/dataBrowser/saveTemplate${tempStr}.png`)
? ? ? break
? ? case 2:
? ? ? this.deleteSelectStockSrc = require(`@/assets/dataBrowser/deleteSelectedRow${tempStr}.png`)
? ? ? break
? ? case 3:
? ? ? this.deleteTableDataSrc = require(`@/assets/dataBrowser/clearCurrentList${tempStr}.png`)
? ? ? break
? }
}