Input 多行文字实现请教?
// 我要做个判断 如果 i.attr.format.align == mulit_line 那么可以进行多行输入,并且高度自适应
<input class="cell-input" type="text" v-model=i.attr.value
@blur="inputBlurCheck(i)" @input="testInput(i)"
:style="{
'fontFamily': i.attr.font_family,
'fontSize': i.attr.font_size + 'px',
'color': i.attr.format.color ? i.attr.format.color : i.attr.font_color,
'backgroundColor': i.attr.background_color,
'letterSpacing': i.attr.letter_spacing,
'textAlign': i.attr.align_h,
'fontWeight': i.attr.font_weight,
'fontStyle': i.attr.font_style,
'textDecoration': i.attr.text_decoration,
}" />
<input v-if ='i.attr.format.align == mulit_line' />
<textarea v-else ... />
这个方法感觉很low
input没法换行，直接textarea，不是多行的话input事件中替换掉输入值的回车（overflow：hidden+white-space:nowrap），但是鼠标会无法像input那样可以左右移动，需要用键盘左右箭头来移动光标，所以还是用做切换好些
自适应的话需要用js来控制textarea的高度，根据滚动高度重新设置高度
简单示例如下
<!doctype html>
<script src="https://unpkg.com/vue@next" data-ver="3"></script>
<style>
textarea{resize:none;line-height:20px;box-sizing:border-box;height:26px;padding:2px;outline:none;overflow:hidden;}
textarea.singleLine{white-space:nowrap}
</style>
<div id="app">
<div v-for="i in arr">
<textarea :ref="i.attr.id" v-model="i.attr.value" @input="testInput(i)" :class="i.attr.format.align=='mulit_line'?'':'singleLine'" :placeholder="i.attr.format.align"></textarea>
</div>
</div>
<script>
var app = {
data() {
return {
arr: [
{
attr: {
id: 'ta1',
value: '',
format: { align: 'single' }
}
},
{
attr: {
id: 'ta2',
value: '',
format: { align: 'mulit_line' }
}
}
]
};
},
methods: {
testInput(i) {
let ta = this.$refs[i.attr.id][0];
if (i.attr.format.align == 'mulit_line') {
ta.style.height = '26px';//恢复默认高度，要不减少内容不会缩回去
ta.style.height = ta.scrollHeight + 2 + 'px';
}
else {
i.attr.value = i.attr.value.replace(/[\r\n]/g, '')
}
}
}
};
Vue.createApp(app).mount('#app')
</script>
textarea没办法高度自适应,只能自己封装
https://blog.csdn.net/m553366999/article/details/124973293
#textarea {
display: block;
margin:0 auto;
overflow: hidden;
width: 550px;
font-size: 14px;
height: 18px;
line-height: 24px;
padding:2px;
}
textarea {
outline: 0 none;
border-color: rgba(82, 168, 236, 0.8);
box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1), 0 0 8px rgba(82, 168, 236, 0.6);
}
<div class="textarea" contenteditable="true"><br /></div>
var text = document.getElementById("textarea");
autoTextarea(text);// 调用
var autoTextarea = function (elem, extra, maxHeight) {
extra = extra || 0;
var isFirefox = !!document.getBoxObjectFor || 'mozInnerScreenX' in window,
isOpera = !!window.opera && !!window.opera.toString().indexOf('Opera'),
addEvent = function (type, callback) {
elem.addEventListener ?
elem.addEventListener(type, callback, false) :
elem.attachEvent('on' + type, callback);
},
getStyle = elem.currentStyle ? function (name) {
var val = elem.currentStyle[name];
if (name === 'height' && val.search(/px/i) !== 1) {
var rect = elem.getBoundingClientRect();
return rect.bottom - rect.top -
parseFloat(getStyle('paddingTop')) -
parseFloat(getStyle('paddingBottom')) + 'px';
};
return val;
} : function (name) {
return getComputedStyle(elem, null)[name];
},
minHeight = parseFloat(getStyle('height'));
elem.style.resize = 'none';
var change = function () {
var scrollTop, height,
padding = 0,
style = elem.style;
if (elem._length === elem.value.length) return;
elem._length = elem.value.length;
if (!isFirefox && !isOpera) {
padding = parseInt(getStyle('paddingTop')) + parseInt(getStyle('paddingBottom'));
};
scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
elem.style.height = minHeight + 'px';
if (elem.scrollHeight > minHeight) {
if (maxHeight && elem.scrollHeight > maxHeight) {
height = maxHeight - padding;
style.overflowY = 'auto';
} else {
height = elem.scrollHeight - padding;
style.overflowY = 'hidden';
};
style.height = height + extra + 'px';
scrollTop += parseInt(style.height) - elem.currHeight;
document.body.scrollTop = scrollTop;
document.documentElement.scrollTop = scrollTop;
elem.currHeight = parseInt(style.height);
};
};
addEvent('propertychange', change);
addEvent('input', change);
addEvent('focus', change);
change();
};
多行直接用
<textarea cols="行数" rows="列数">内容</textarea>
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