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syscall/js: improve documentation about mappings to JavaScript values

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This commit moves the documentation about how Go values are mapped to
JavaScript values to the functions that apply the mapping, instead of
mentioning them in the documentation of the types being mapped. This
should be easier to read.

Change-Id: I2465eb4a45f71b3b61624349e908a195010a09f1
Reviewed-on: https://go-review.googlesource.com/126856
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Richard Musiol 2018-07-31 15:17:31 +02:00 committed by Brad Fitzpatrick
parent 1a5350e123
commit ecec63c8a1
3 changed files with 6 additions and 7 deletions
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5
src/syscall/js/callback.go
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@ -43,15 +43,12 @@ var (
)
// Callback is a Go function that got wrapped for use as a JavaScript callback.
// A Callback can be passed to functions of this package that accept interface{},
// for example Value.Set and Value.Call.
type Callback struct {
Value // the JavaScript function that queues the callback for execution
id uint32
}
// NewCallback returns a wrapped callback function. It can be passed to functions of this package
// that accept interface{}, for example Value.Set and Value.Call.
// NewCallback returns a wrapped callback function.
//
// Invoking the callback in JavaScript will queue the Go function fn for execution.
// This execution happens asynchronously on a special goroutine that handles all callbacks and preserves

7
src/syscall/js/js.go
View File

@ -216,7 +216,7 @@ func (v Value) Get(p string) Value {
func valueGet(v ref, p string) ref
// Set sets the JavaScript property p of value v to x.
// Set sets the JavaScript property p of value v to ValueOf(x).
func (v Value) Set(p string, x interface{}) {
valueSet(v.ref, p, ValueOf(x).ref)
}
@ -230,7 +230,7 @@ func (v Value) Index(i int) Value {
func valueIndex(v ref, i int) ref
// SetIndex sets the JavaScript index i of value v to x.
// SetIndex sets the JavaScript index i of value v to ValueOf(x).
func (v Value) SetIndex(i int, x interface{}) {
valueSetIndex(v.ref, i, ValueOf(x).ref)
}
@ -254,6 +254,7 @@ func valueLength(v ref) int
// Call does a JavaScript call to the method m of value v with the given arguments.
// It panics if v has no method m.
// The arguments get mapped to JavaScript values according to the ValueOf function.
func (v Value) Call(m string, args ...interface{}) Value {
res, ok := valueCall(v.ref, m, makeArgs(args))
if !ok {
@ -272,6 +273,7 @@ func valueCall(v ref, m string, args []ref) (ref, bool)
// Invoke does a JavaScript call of the value v with the given arguments.
// It panics if v is not a function.
// The arguments get mapped to JavaScript values according to the ValueOf function.
func (v Value) Invoke(args ...interface{}) Value {
res, ok := valueInvoke(v.ref, makeArgs(args))
if !ok {
@ -287,6 +289,7 @@ func valueInvoke(v ref, args []ref) (ref, bool)
// New uses JavaScript's "new" operator with value v as constructor and the given arguments.
// It panics if v is not a function.
// The arguments get mapped to JavaScript values according to the ValueOf function.
func (v Value) New(args ...interface{}) Value {
res, ok := valueNew(v.ref, makeArgs(args))
if !ok {

1
src/syscall/js/typedarray.go
View File

@ -41,7 +41,6 @@ var (
)
// TypedArrayOf returns a JavaScript typed array backed by the slice's underlying array.
// It can be passed to functions of this package that accept interface{}, for example Value.Set and Value.Call.
//
// The supported types are []int8, []int16, []int32, []uint8, []uint16, []uint32, []float32 and []float64.
// Passing an unsupported value causes a panic.