Explicit way to check whether a function was called from within the WindowIs there a better way to do...
Lubuntu 18.10 File Manager: How to view directory tree structure?
Coworker is trying to get me to sign his petition to run for office. How to decline politely?
Is it possible to narrate a novel in a faux-historical style without alienating the reader?
Can you say "leftside right"?
How can guns be countered by melee combat without raw-ability or exceptional explanations?
Was Opportunity's last message to Earth "My battery is low and it's getting dark"?
Minimum Viable Product for RTS game?
How to know if I am a 'Real Developer'
Players preemptively rolling, even though their rolls are useless or are checking the wrong skills
Did ancient Germans take pride in leaving the land untouched?
What can I do to encourage my players to use their consumables?
Can I use a single resistor for multiple LED with different +ve sources?
Is practicing on a digital piano harmful to an experienced piano player?
Is it possible to detect 100% of SQLi with a simple regex?
Process substitution inside a subshell to set a variable
If I tried and failed to start my own business, how do I apply for a job without job experience?
Why don't you get burned by the wood benches in a sauna?
Renting a 2CV in France
Promise.all returning empty objects
What could cause an entire planet of humans to become aphasic?
How do I narratively explain how in-game circumstances do not mechanically allow a PC to instantly kill an NPC?
Size problems when plotting xy/(x^2+2y^2)
I am a giant among ants
Why is Shelob considered evil?
Explicit way to check whether a function was called from within the Window
Is there a better way to do optional function parameters in JavaScript?Trigger a button click with JavaScript on the Enter key in a text boxWhat is the best way to add options to a select from as a JS object with jQuery?(Built-in) way in JavaScript to check if a string is a valid numberHow to check whether a string contains a substring in JavaScript?What is the correct way to check for string equality in JavaScript?Is there a standard function to check for null, undefined, or blank variables in JavaScript?Check if a variable is of function typeCheck whether a string matches a regex in JSHow do I return the response from an asynchronous call?
Is there a more explicit way of checking whether a function was called from within Window than if (typeof this.value == "undefined")
in the code below?
So that it is apparent that I am checking against Window, something like: if this.name === "Window".
function get_caller() {
if (typeof this.value == "undefined") {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>javascript
asked 2 hours ago
barciewiczbarciewicz
665313
add a comment |
Is there a more explicit way of checking whether a function was called from within Window than if (typeof this.value == "undefined")
in the code below?
So that it is apparent that I am checking against Window, something like: if this.name === "Window".
function get_caller() {
if (typeof this.value == "undefined") {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>javascript
asked 2 hours ago
barciewiczbarciewicz
665313
1
What happens when somebody callsget_caller.call({value: "I am not in window"})?
– VLAZ
2 hours ago
add a comment |
Is there a more explicit way of checking whether a function was called from within Window than if (typeof this.value == "undefined")
in the code below?
So that it is apparent that I am checking against Window, something like: if this.name === "Window".
function get_caller() {
if (typeof this.value == "undefined") {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>javascript
asked 2 hours ago
barciewiczbarciewicz
665313
Is there a more explicit way of checking whether a function was called from within Window than if (typeof this.value == "undefined")
in the code below?
So that it is apparent that I am checking against Window, something like: if this.name === "Window".
function get_caller() {
if (typeof this.value == "undefined") {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>function get_caller() {
if (typeof this.value == "undefined") {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>function get_caller() {
if (typeof this.value == "undefined") {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>javascript
javascript
asked 2 hours ago
barciewiczbarciewicz
665313
asked 2 hours ago
barciewiczbarciewicz
665313
edited 1 hour ago
barciewicz
asked 2 hours ago
barciewiczbarciewicz
665313
asked 2 hours ago
barciewiczbarciewicz
665313
asked 2 hours ago
barciewiczbarciewicz
665313
665313
1
What happens when somebody callsget_caller.call({value: "I am not in window"})?
– VLAZ
2 hours ago
add a comment |
1
What happens when somebody callsget_caller.call({value: "I am not in window"})?
– VLAZ
2 hours ago
1
1
What happens when somebody calls
get_caller.call({value: "I am not in window"})?– VLAZ
2 hours ago
What happens when somebody calls
get_caller.call({value: "I am not in window"})?– VLAZ
2 hours ago
add a comment |
2 Answers
2
active
oldest
votes
Just check if this is window:
function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
SnowSnow
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Orundefined, in strict mode, which is the more common case today with webpack/modules.
– Madara Uchiha♦
58 mins ago
add a comment |
You can check if this==window or if strict mode is on check if this is undefined,
function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
Code_ModeCode_Mode
906714
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54850048%2fexplicit-way-to-check-whether-a-function-was-called-from-within-the-window%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Just check if this is window:
function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
SnowSnow
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Orundefined, in strict mode, which is the more common case today with webpack/modules.
– Madara Uchiha♦
58 mins ago
add a comment |
Just check if this is window:
function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
SnowSnow
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Orundefined, in strict mode, which is the more common case today with webpack/modules.
– Madara Uchiha♦
58 mins ago
add a comment |
Just check if this is window:
function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
SnowSnow
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Just check if this is window:
function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>function get_caller() {
if (this === window) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
SnowSnow
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 2 hours ago
SnowSnow
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 2 hours ago
SnowSnow
15611
answered 2 hours ago
SnowSnow
15611
15611
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Snow is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Orundefined, in strict mode, which is the more common case today with webpack/modules.
– Madara Uchiha♦
58 mins ago
add a comment |
Orundefined, in strict mode, which is the more common case today with webpack/modules.
– Madara Uchiha♦
58 mins ago
Or
undefined, in strict mode, which is the more common case today with webpack/modules.– Madara Uchiha♦
58 mins ago
Or
undefined, in strict mode, which is the more common case today with webpack/modules.– Madara Uchiha♦
58 mins ago
add a comment |
You can check if this==window or if strict mode is on check if this is undefined,
function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
Code_ModeCode_Mode
906714
add a comment |
You can check if this==window or if strict mode is on check if this is undefined,
function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
Code_ModeCode_Mode
906714
add a comment |
You can check if this==window or if strict mode is on check if this is undefined,
function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
Code_ModeCode_Mode
906714
You can check if this==window or if strict mode is on check if this is undefined,
function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>function get_caller() {
"use strict"; // !this is used for strict mode check
if (this == window || !this) {
console.log('function get_caller called from window')
}
else {
console.log('function get_caller called by button press')
}
}
btn.addEventListener('click', get_caller)
get_caller()<button id="btn">Get caller</button>answered 2 hours ago
Code_ModeCode_Mode
906714
answered 2 hours ago
Code_ModeCode_Mode
906714
answered 2 hours ago
Code_ModeCode_Mode
906714
answered 2 hours ago
Code_ModeCode_Mode
906714
906714
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54850048%2fexplicit-way-to-check-whether-a-function-was-called-from-within-the-window%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
What happens when somebody calls
get_caller.call({value: "I am not in window"})?– VLAZ
2 hours ago