2.4 KiB
2.4 KiB
id | title | challengeType | isRequired |
---|---|---|---|
5a24c314108439a4d403616b | Use Default Props | 6 | false |
Description
MyComponent.defaultProps = { location: 'San Francisco' }
, you have defined a location prop that's set to the string San Francisco
, unless you specify otherwise. React assigns default props if props are undefined, but if you pass null
as the value for a prop, it will remain null
.
Instructions
ShoppingCart
component. Define default props on this component which specify a prop items
with a value of 0
.
Tests
tests:
- text: The <code>ShoppingCart</code> component should render.
testString: assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ShoppingCart)); return mockedComponent.find('ShoppingCart').length === 1; })(), 'The <code>ShoppingCart</code> component should render.');
- text: 'The <code>ShoppingCart</code> component should have a default prop of <code>{ items: 0 }</code>.'
testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ShoppingCart)); mockedComponent.setProps({items: undefined}); return mockedComponent.find(''ShoppingCart'').props().items === 0; })(), ''The <code>ShoppingCart</code> component should have a default prop of <code>{ items: 0 }</code>.'');'
Challenge Seed
const ShoppingCart = (props) => {
return (
<div>
<h1>Shopping Cart Component</h1>
</div>
)
};
// change code below this line
After Test
ReactDOM.render(<ShoppingCart />, document.getElementById('root'))
Solution
const ShoppingCart = (props) => {
return (
<div>
<h1>Shopping Cart Component</h1>
</div>
)
};
// change code below this line
ShoppingCart.defaultProps = {
items: 0
}