结果:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.gray {
-webkit-filter: grayscale(100%);
-moz-filter: grayscale(100%);
-ms-filter: grayscale(100%);
-o-filter: grayscale(100%);
filter: grayscale(100%);
filter: gray;
}
.con {
height: 200px;
width: 200px;
background-image: url('./img/Chrome.jpg');
}
</style>
</head>
<body>
<img src="img/Chrome.jpg" />
<img src="img/Chrome.jpg" class="gray" />
<div class="con gray">555</div>
<script>
var obj = [{
name: '',
age: '18'
},
{
name: '',
age: '18'
},
{
name: '',
age: '18'
}
]
obj.map((item,index)=>{
for(var i in item){
if(item[i] === null || item[i] === ''){
item[i] = '/'
}
}
})
console.log(obj)
</script>
</body>
</html>