Preface:In daily development work, we may encounter the copying of all values in objects in js, or it may be the setting merge problem faced during the revision of the client through electron development. Then this article will give a brief description of this solution.
Introduction: For example, with obj1 and obj2, we need to copy all values in obj1 with the same depth as in obj2 to obj2, and we need to keep the obj2 field structure unchanged, and just call the method (using ES6 writing method).
Code:
/**
* Copy the data in src into dist and keep the structure of dist
* @param src
* @param dist
*/
copyValue(src, dist) {
if (!src || typeof(src) !== 'object' || typeof(dist) !== 'object'){
return ;
}
let keys = (dist)
if (keys && > 0 && isNaN(keys[0])){
(key => {
let value = dist[key]
let srcVal = src[key]
// Determine whether it is an object. If it is, continue to traverse; if it is not, start assigning or ignoring if (value !== undefined && typeof(value) === 'object' && srcVal && typeof(srcVal) === 'object' && srcVal[0] === undefined){
copyValue(srcVal, value)
} else if (value !== undefined && srcVal && typeof(value) == typeof (srcVal)){
// If the source data exists and the types are the same, start assignment dist[key] = src[key]
}
})
}
},
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.