instascan scanner as promise
I'am using instascan.min.js to use my webcam in FF. All working. How can i detect that a qrcode is read en then continue a script? I think it has something to do with promise but i can't figure it out.
steps are.
1. start scanner and wait for user to scan qrcode
2. Catch qrcode and save to sessionStorage
3. call another function
this is the sample code i've used:
function startScanner() {
$('#preview').show();
let scanner = new Instascan.Scanner({
video: document.getElementById('preview'),
continuous: true,
mirror: false,
captureImage: false,
backgroundScan: true,
refractoryPeriod: 1000,
scanPeriod: 1
});
scanner.addListener('scan', function (content) {
return content;
});
Instascan.Camera.getCameras().then(function (cameras) {
if (cameras.length > 0) {
scanner.start(cameras[0]);
} else {
console.error('No cameras found.');
}
}).catch(function (e) {
alert('No camera found which can be used.')
console.error(e);
});
}
i don't know how to catch the content var en make the script execute further.
javascript jquery html5
asked Nov 13 '18 at 16:30
WotikarWotikar
124
add a comment |
I'am using instascan.min.js to use my webcam in FF. All working. How can i detect that a qrcode is read en then continue a script? I think it has something to do with promise but i can't figure it out.
steps are.
1. start scanner and wait for user to scan qrcode
2. Catch qrcode and save to sessionStorage
3. call another function
this is the sample code i've used:
function startScanner() {
$('#preview').show();
let scanner = new Instascan.Scanner({
video: document.getElementById('preview'),
continuous: true,
mirror: false,
captureImage: false,
backgroundScan: true,
refractoryPeriod: 1000,
scanPeriod: 1
});
scanner.addListener('scan', function (content) {
return content;
});
Instascan.Camera.getCameras().then(function (cameras) {
if (cameras.length > 0) {
scanner.start(cameras[0]);
} else {
console.error('No cameras found.');
}
}).catch(function (e) {
alert('No camera found which can be used.')
console.error(e);
});
}
i don't know how to catch the content var en make the script execute further.
javascript jquery html5
asked Nov 13 '18 at 16:30
WotikarWotikar
124
add a comment |
I'am using instascan.min.js to use my webcam in FF. All working. How can i detect that a qrcode is read en then continue a script? I think it has something to do with promise but i can't figure it out.
steps are.
1. start scanner and wait for user to scan qrcode
2. Catch qrcode and save to sessionStorage
3. call another function
this is the sample code i've used:
function startScanner() {
$('#preview').show();
let scanner = new Instascan.Scanner({
video: document.getElementById('preview'),
continuous: true,
mirror: false,
captureImage: false,
backgroundScan: true,
refractoryPeriod: 1000,
scanPeriod: 1
});
scanner.addListener('scan', function (content) {
return content;
});
Instascan.Camera.getCameras().then(function (cameras) {
if (cameras.length > 0) {
scanner.start(cameras[0]);
} else {
console.error('No cameras found.');
}
}).catch(function (e) {
alert('No camera found which can be used.')
console.error(e);
});
}
i don't know how to catch the content var en make the script execute further.
javascript jquery html5
asked Nov 13 '18 at 16:30
WotikarWotikar
124
I'am using instascan.min.js to use my webcam in FF. All working. How can i detect that a qrcode is read en then continue a script? I think it has something to do with promise but i can't figure it out.
steps are.
1. start scanner and wait for user to scan qrcode
2. Catch qrcode and save to sessionStorage
3. call another function
this is the sample code i've used:
function startScanner() {
$('#preview').show();
let scanner = new Instascan.Scanner({
video: document.getElementById('preview'),
continuous: true,
mirror: false,
captureImage: false,
backgroundScan: true,
refractoryPeriod: 1000,
scanPeriod: 1
});
scanner.addListener('scan', function (content) {
return content;
});
Instascan.Camera.getCameras().then(function (cameras) {
if (cameras.length > 0) {
scanner.start(cameras[0]);
} else {
console.error('No cameras found.');
}
}).catch(function (e) {
alert('No camera found which can be used.')
console.error(e);
});
}
i don't know how to catch the content var en make the script execute further.
javascript jquery html5
javascript jquery html5
asked Nov 13 '18 at 16:30
WotikarWotikar
124
asked Nov 13 '18 at 16:30
WotikarWotikar
124
asked Nov 13 '18 at 16:30
WotikarWotikar
124
asked Nov 13 '18 at 16:30
WotikarWotikar
124
asked Nov 13 '18 at 16:30
WotikarWotikar
124
124
add a comment |
add a comment |
0
active
oldest
votes
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%2f53285463%2finstascan-scanner-as-promise%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
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%2f53285463%2finstascan-scanner-as-promise%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
