js-if判断非空等情况
const emptyValue ='';
const undefinedValue = undefined;
const nullValue = null;
const emtpyArrayValue = [];
const emptyObjectValue = {};
const secondLevelObjectValue ={name:'name'};
if(emptyValue ||
undefinedValue ||
nullValue ||
emtpyArrayValue.length>0 ||
Object.keys(emptyObjectValue).length>0 ||
secondLevelObjectValue.title
){
console.log(‘空’);
}else{
console.log(‘非空’);
}
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