TypeScript describes a parameter through Interface?
interface Opts {
method: string;
header: object;
body: object;
}
function request(url: string, opts: Opts) {
// opts.methodopts.header
// ...
}
interface Opts {
method: string;
header: object;
body: object;
}
function request(url: string, opts: Opts) {
// opts.methodopts.header
// ...
}
interface Opts {
method: string;
header: object;
body: object;
}
const defaultOpts:Opts = {
method='get',
header= {},
body={}
}
function request(url: string, opts: Opts) {
opts = Object.assign(defaultOpts,opts)
//
opts = {...defaultOpts,...opts}
} there is a potential danger in the above answer: both assign and structure assignments can only be replaced by layer 1, and layer 2 attribute values cannot be compared.
as in the above code, it is assumed that the default defaultOpts.body = {avav _ 1jbv _ 2}, but in the parameter passed, props.body = {av _ 3}, then the merging value of the two does not have the attribute xxx.body.b.
is actually true. There is no so-called default value in interface, which is different from the attributes in react PropType or vue
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