vue查找组件
Vue找到任意组件实例—findComponents
它适用于以下场景:
- 由一个组件,向上找到最近的指定组件;
- 由一个组件,向上找到所有的指定组件;
- 由一个组件,向下找到最近的指定组件;
- 由一个组件,向下找到所有指定的组件;
- 由一个组件,找到指定组件的兄弟组件。
// 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 };
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; }
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 []; } }
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; }
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); }, []); }
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; }
使用举例:



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