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vue-find-component.js
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vue-find-component.js
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// 由一个组件,向上找到最近的指定组件
function findComponentUpward (context, componentName) {
let parent = context.$parent;
let name = parent.$options.name;
while (parent && (!name || [componentName].indexOf(name) < 0)) {
parent = parent.$parent;
if (parent) name = parent.$options.name;
}
return parent;
}
export { findComponentUpward };
// 由一个组件,向上找到所有的指定组件
function findComponentsUpward (context, componentName) {
let parents = [];
const parent = context.$parent;
if (parent) {
if (parent.$options.name === componentName) parents.push(parent);
return parents.concat(findComponentsUpward(parent, componentName));
} else {
return [];
}
}
export { findComponentsUpward };
// 由一个组件,向下找到最近的指定组件
function findComponentDownward (context, componentName) {
const childrens = context.$children;
let children = null;
if (childrens.length) {
for (const child of childrens) {
const name = child.$options.name;
if (name === componentName) {
children = child;
break;
} else {
children = findComponentDownward(child, componentName);
if (children) break;
}
}
}
return children;
}
export { findComponentDownward };
// 由一个组件,向下找到所有指定的组件
function findComponentsDownward (context, componentName) {
return context.$children.reduce((components, child) => {
if (child.$options.name === componentName) components.push(child);
const foundChilds = findComponentsDownward(child, componentName);
return components.concat(foundChilds);
}, []);
}
export { findComponentsDownward };
// 由一个组件,找到指定组件的兄弟组件
function findBrothersComponents (context, componentName, exceptMe = true) {
let res = context.$parent.$children.filter(item => {
return item.$options.name === componentName;
});
let index = res.findIndex(item => item._uid === context._uid);
if (exceptMe) res.splice(index, 1);
return res;
}
export { findBrothersComponents };
function typeOf(obj) {
const toString = Object.prototype.toString;
const map = {
'[object Boolean]' : 'boolean',
'[object Number]' : 'number',
'[object String]' : 'string',
'[object Function]' : 'function',
'[object Array]' : 'array',
'[object Date]' : 'date',
'[object RegExp]' : 'regExp',
'[object Undefined]': 'undefined',
'[object Null]' : 'null',
'[object Object]' : 'object'
};
return map[toString.call(obj)];
}
// deepCopy
function deepCopy(data) {
const t = typeOf(data);
let o;
if (t === 'array') {
o = [];
} else if ( t === 'object') {
o = {};
} else {
return data;
}
if (t === 'array') {
for (let i = 0; i < data.length; i++) {
o.push(deepCopy(data[i]));
}
} else if ( t === 'object') {
for (let i in data) {
o[i] = deepCopy(data[i]);
}
}
return o;
}
export {deepCopy};