Answer1215

摘要： Property Binding is bind property NOT attribute! So 'class' is attribute on DOM, but 'class.active' is an property. 'aria-label' is attribute, so need 阅读全文

摘要： In Angular2, sometime we use @Output to pass data to parent component, then parent may pass the data down to another child component. When you want to 阅读全文

摘要： When you want to access child component's method, you can use @ViewChild in the parent: Parent Component: Child Component: 阅读全文

摘要： Just like create html page, you can create a svg tag by: Inside svg, x,y: control the position of element fill: control the color of element height, w 阅读全文

摘要： Async Pipe: The Asynce pipe receive a Promise or Observable as input and subscribes to the input, evetually emitting the value(s) changes arrive. In t 阅读全文

摘要： Define a function type and params type: 阅读全文

摘要： setRouteWillLeaveHook provides a method for us to intercept a route change before leaving the current route. setRouteWillLeaveHook provides a method f 阅读全文

摘要： The Redirect component in react-router does exactly what it sounds like. It allows us to redirect from from one route to another. The Redirect compone 阅读全文

摘要： Define query param in Link, accept path and query : Use Query param by props.location.query: 阅读全文

摘要： In this lesson we'll learn how to render multiple component children from a single route. Define a named component by "components": 'header' and 'body 阅读全文