如何用 html+css 实现平行四边形，以及气泡

transform:skewX(30deg)

扭曲skew()函数能够让元素倾斜显示。它可以将一个对象以其中心位置围绕着X轴和Y轴按照一定的角度倾斜。这与rotate()函数的旋转不同，rotate()函数只是旋转，而不会改变

元素的形状。skew()函数不会旋转，而只会改变元素的形状。

一个参数：表示水平方向的倾斜角度；

两个参数：第一个参数表示水平方向的倾斜角度，第二个参数表示垂直方向的倾斜角度

气泡需要两个组合

:class="[prefixCls + '-rel']"

v-el:reference

@click="handleClick"

-@mousedown="handleFocus"

-@mouseup="handleBlur">

+@mousedown="handleFocus(false)"

+@mouseup="handleBlur(false)">

<slot></slot>

</div>

<div :class="[prefixCls + '-popper']" :style="styles" transition="fade" v-el:popper v-show="visible">

@@ -91,7 +91,8 @@

data () {

return {

prefixCls: prefixCls,

-showTitle: true

+showTitle: true,

+isInput: false

}

},

computed: {

@@ -133,14 +134,14 @@

}

this.visible = false

},

-handleFocus () {

-if (this.trigger !== 'focus' || this.confirm) {

+handleFocus (fromInput = true) {

+if (this.trigger !== 'focus' || this.confirm || (this.isInput &&!fromInput)) {

return false

}

this.visible = true

},

-handleBlur () {

-if (this.trigger !== 'focus' || this.confirm) {

+handleBlur (fromInput = true) {

+if (this.trigger !== 'focus' || this.confirm || (this.isInput &&!fromInput)) {

return false

}

this.visible = false

@@ -164,12 +165,41 @@

ok () {

this.visible = false

this.$emit('on-ok')

+},

+getInputChildren () {

+const $input = this.$els.reference.querySelectorAll('input')

+const $textarea = this.$els.reference.querySelectorAll('textarea')

+let $children = null

+

+if ($input.length) {

+$children = $input[0]

+} else if ($textarea.length) {

+$children = $textarea[0]

+}

+

+return $children

}

},

-ready () {

+compiled () {

if (!this.confirm) {

this.showTitle = this.$els.title.innerHTML != `<div class="${prefixCls}-title-inner"></div>`

}

+// if trigger and children is input or textarea,listen focus &blur event

+if (this.trigger === 'focus') {

+const $children = this.getInputChildren()

+if ($children) {

+$children.addEventListener('focus', this.handleFocus, false)

+$children.addEventListener('blur', this.handleBlur, false)

+this.isInput = true

+}

+}

+},

+beforeDestroy () {

+const $children = this.getInputChildren()

+if ($children) {

+$children.removeEventListener('focus', this.handleFocus, false)

+$children.removeEventListener('blur', this.handleBlur, false)

+}

}

}

</script>

---