how to javascript websocket call a function in onmessage?
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websocketstart()
{
exampleSocket = new WebSocket('ws://127.0.0.1:8000');
exampleSocket.onopen = function() {
// alert('handshake successfully established. May send data now...');
// exampleSocket.send('hello!!!')
};
exampleSocket.onmessage = function(event) {
let result = JSON.parse(event.data);
if(result.error == false)
{
console.log("ERROR : " + result.parent.message);
alert('error');
return;
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
return;
};
exampleSocket.onclose = function() {
alert('connection closed');
};
}
wantcallfunction()
{
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
Is there any other way to call the function from within onmessage?
javascript websocket
asked Nov 20 at 2:36
stiveaustin
64
add a comment |
up vote
0
down vote
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websocketstart()
{
exampleSocket = new WebSocket('ws://127.0.0.1:8000');
exampleSocket.onopen = function() {
// alert('handshake successfully established. May send data now...');
// exampleSocket.send('hello!!!')
};
exampleSocket.onmessage = function(event) {
let result = JSON.parse(event.data);
if(result.error == false)
{
console.log("ERROR : " + result.parent.message);
alert('error');
return;
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
return;
};
exampleSocket.onclose = function() {
alert('connection closed');
};
}
wantcallfunction()
{
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
Is there any other way to call the function from within onmessage?
javascript websocket
asked Nov 20 at 2:36
stiveaustin
64
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
websocketstart()
{
exampleSocket = new WebSocket('ws://127.0.0.1:8000');
exampleSocket.onopen = function() {
// alert('handshake successfully established. May send data now...');
// exampleSocket.send('hello!!!')
};
exampleSocket.onmessage = function(event) {
let result = JSON.parse(event.data);
if(result.error == false)
{
console.log("ERROR : " + result.parent.message);
alert('error');
return;
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
return;
};
exampleSocket.onclose = function() {
alert('connection closed');
};
}
wantcallfunction()
{
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
Is there any other way to call the function from within onmessage?
javascript websocket
asked Nov 20 at 2:36
stiveaustin
64
websocketstart()
{
exampleSocket = new WebSocket('ws://127.0.0.1:8000');
exampleSocket.onopen = function() {
// alert('handshake successfully established. May send data now...');
// exampleSocket.send('hello!!!')
};
exampleSocket.onmessage = function(event) {
let result = JSON.parse(event.data);
if(result.error == false)
{
console.log("ERROR : " + result.parent.message);
alert('error');
return;
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
return;
};
exampleSocket.onclose = function() {
alert('connection closed');
};
}
wantcallfunction()
{
}
this.wantcallfunction(); //<---- SCRIPT438: Object doesn't support property or method 'wantcallfunction'
Is there any other way to call the function from within onmessage?
javascript websocket
javascript websocket
asked Nov 20 at 2:36
stiveaustin
64
asked Nov 20 at 2:36
stiveaustin
64
asked Nov 20 at 2:36
stiveaustin
64
asked Nov 20 at 2:36
stiveaustin
64
asked Nov 20 at 2:36
stiveaustin
64
64
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
up vote
0
down vote
Use arrow functions so you keep context of this as the class.
Change
exampleSocket.onmessage = function(event) {
// `this` is not the class
To
exampleSocket.onmessage = (event) => {
// `this` is the class
answered Nov 20 at 2:43
charlietfl
138k1286118
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
add a comment |
up vote
0
down vote
static instance : MySocketTest
MySocketTest.instance = this;
exampleSocket.onmessage = function(event) {
MySocketTest.instance.wantcallfunction();
Resolved.
There is no error, but I do not know if this is correct.
answered Nov 20 at 2:47
stiveaustin
64
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Use arrow functions so you keep context of this as the class.
Change
exampleSocket.onmessage = function(event) {
// `this` is not the class
To
exampleSocket.onmessage = (event) => {
// `this` is the class
answered Nov 20 at 2:43
charlietfl
138k1286118
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
add a comment |
up vote
0
down vote
Use arrow functions so you keep context of this as the class.
Change
exampleSocket.onmessage = function(event) {
// `this` is not the class
To
exampleSocket.onmessage = (event) => {
// `this` is the class
answered Nov 20 at 2:43
charlietfl
138k1286118
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
add a comment |
up vote
0
down vote
up vote
0
down vote
Use arrow functions so you keep context of this as the class.
Change
exampleSocket.onmessage = function(event) {
// `this` is not the class
To
exampleSocket.onmessage = (event) => {
// `this` is the class
answered Nov 20 at 2:43
charlietfl
138k1286118
Use arrow functions so you keep context of this as the class.
Change
exampleSocket.onmessage = function(event) {
// `this` is not the class
To
exampleSocket.onmessage = (event) => {
// `this` is the class
answered Nov 20 at 2:43
charlietfl
138k1286118
edited Nov 20 at 2:48
answered Nov 20 at 2:43
charlietfl
138k1286118
answered Nov 20 at 2:43
charlietfl
138k1286118
answered Nov 20 at 2:43
charlietfl
138k1286118
138k1286118
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
add a comment |
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
It works well within the script. Just call function in another script in wantcallfunction (). mywebsockt.ts ㄴ wantcallfunction() -> [other.ts] othercallback() other.ts ㄴothercallback -> otherfunction() // <- SCRIPT5007: Unable to get property 'otherfunction' of undefined or null reference
– stiveaustin
Nov 20 at 3:27
add a comment |
up vote
0
down vote
static instance : MySocketTest
MySocketTest.instance = this;
exampleSocket.onmessage = function(event) {
MySocketTest.instance.wantcallfunction();
Resolved.
There is no error, but I do not know if this is correct.
answered Nov 20 at 2:47
stiveaustin
64
add a comment |
up vote
0
down vote
static instance : MySocketTest
MySocketTest.instance = this;
exampleSocket.onmessage = function(event) {
MySocketTest.instance.wantcallfunction();
Resolved.
There is no error, but I do not know if this is correct.
answered Nov 20 at 2:47
stiveaustin
64
add a comment |
up vote
0
down vote
up vote
0
down vote
static instance : MySocketTest
MySocketTest.instance = this;
exampleSocket.onmessage = function(event) {
MySocketTest.instance.wantcallfunction();
Resolved.
There is no error, but I do not know if this is correct.
answered Nov 20 at 2:47
stiveaustin
64
static instance : MySocketTest
MySocketTest.instance = this;
exampleSocket.onmessage = function(event) {
MySocketTest.instance.wantcallfunction();
Resolved.
There is no error, but I do not know if this is correct.
answered Nov 20 at 2:47
stiveaustin
64
edited Nov 20 at 2:53
answered Nov 20 at 2:47
stiveaustin
64
answered Nov 20 at 2:47
stiveaustin
64
answered Nov 20 at 2:47
stiveaustin
64
64
add a comment |
add a comment |
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