标签:too index deb template sage 多个 dex aci app
使用 Props 传递数据
组件实例的作用域是孤立的。这意味着不能并且不应该在子组件的模板内直接引用父组件的数据。可以使用 props 把数据传给子组件。
“prop” 是组件数据的一个字段,期望从父组件传下来。子组件需要显式地用 props 选项 声明 props:
| 1 2 3 4 5 6 7 | Vue.component(‘child‘, { // 声明 props props: [‘msg‘], // prop 可以用在模板内 // 可以用 `this.msg` 设置 template: ‘<span>{{ msg }}</span>‘}) | 
然后向它传入一个普通字符串:
<child msg="hello!"></child>
举例
错误写法:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | <!DOCTYPE html><htmllang="en"><head> <scripttype="text/javascript"src="./vue.js"></script> <metacharset="UTF-8"> <title>vue.js</title></head><body><pre> //使用 props 传输资料予子组件 //props , data 重复名称会出现错误</pre><divid="app1"> <childmssage="hello!"></child></div><script> Vue.config.debug = true; Vue.component(‘child‘, { // declare the props props: [‘msg‘,‘nihao‘,‘nisha‘], // the prop can be used inside templates, and will also // be set as `this.msg` template: ‘<span>{{ msg }}{{nihao}}{{nisha}}</span>‘, data: function() { return { mssage: ‘boy‘ } } }); var vm = new Vue({ el: ‘#app1‘ })</script></body></html> | 
正确写法:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | <!DOCTYPE html><htmllang="en"><head> <scripttype="text/javascript"src="./vue.js"></script> <metacharset="UTF-8"> <title>vue.js</title></head><body><pre> //使用 props 传输资料予子组件 //props , data 重复名称会出现错误</pre><divid="app1"> <childmssage="hello!"></child></div><script> Vue.config.debug = true; Vue.component(‘child‘, { // declare the props props: [‘msg‘,‘nihao‘,‘nisha‘], // the prop can be used inside templates, and will also // be set as `this.msg` template: ‘<span>{{ msg }}{{nihao}}{{nisha}}</span>‘ }); var vm = new Vue({ el: ‘#app1‘ })</script></body></html> | 
props 传入多个数据(顺序问题)
第一种:
HTML
| 1 2 3 4 5 | <divid="app1"><childmsg="hello!"></child><childnihao="hello1!"></child><childnisha="hello2!"></child></div> | 
JS
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | Vue.config.debug = true;Vue.component(‘child‘, {// declare the propsprops: [‘msg‘,‘nihao‘,‘nisha‘],// the prop can be used inside templates, and will also// be set as `this.msg`template: ‘<span>{{ msg }}{{nihao}}{{nisha}}</span>‘,/*data: function() {return {msg: ‘boy‘}}*/});varvm = newVue({el: ‘#app1‘}) | 
结果:hello! hello1! hello2!
第二种:
HTML
| 1 2 3 4 5 | <divid="app1"><childmsg="hello!"></child> <childnihao="hello1!"></child> <childnisha="hello2!"></child></div> | 
JS
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | Vue.config.debug = true;Vue.component(‘child‘, {// declare the propsprops: [‘msg‘,‘nihao‘,‘nisha‘],// the prop can be used inside templates, and will also// be set as `this.msg`template: ‘<span>123{{ msg }}{{nihao}}{{nisha}}</span>‘,/*data: function() {return {msg: ‘boy‘}}*/});varvm = newVue({el: ‘#app1‘}) | 
结果:123hello! 123hello1! 123hello2!
第三种:
HTML
| 1 2 3 4 5 | <divid="app1"><childmsg="hello!"></child><childnihao="hello1!"></child> <childnisha="hello2!"></child></div> | 
JS
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | Vue.config.debug = true;Vue.component(‘child‘, {// declare the propsprops: [‘msg‘,‘nihao‘,‘nisha‘],// the prop can be used inside templates, and will also// be set as `this.msg`template: ‘<span>{{ msg }}{{nihao}}{{nisha}}123</span>‘,/*data: function() {return {msg: ‘boy‘}}*/});varvm = newVue({el: ‘#app1‘}) | 
结果:hello! 123 hello1! 123 hello2!123
第四种:
HTML
| 1 2 3 4 5 | <divid="app1"><childmsg="hello!"></child><childnihao="hello1!"></child><childnisha="hello2!"></child></div> | 
JS
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | Vue.config.debug = true;Vue.component(‘child‘, {// declare the propsprops: [‘msg‘,‘nihao‘,‘nisha‘],// the prop can be used inside templates, and will also// be set as `this.msg`template: ‘<span>{{ msg }}123{{nihao}}{{nisha}}123</span>‘,/*data: function() {return {msg: ‘boy‘}}*/});varvm = newVue({el: ‘#app1‘}) | 
结果:hello! 123 123hello1! 123hello2!
结论:
在props 中传入多个数据是,如果在父组件的模板类添加其他元素或者字符会有:
1-在最前面加入—每个子组件渲染出来都会在其前面加上
2-在最后面加入—每个子组件渲染出来都会在其后面加上
3-在中间加入—他前面子组件后面加上,后面的子组件后面加上
标签:too index deb template sage 多个 dex aci app
原文地址:https://www.cnblogs.com/aillabig/p/9786002.html