How to monitor changes in webview document title with react native
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I basically try to call a function in react native as soon as the document title in my webview changes. I already get the document.title of the web page that is shown in my webview by using this code:
handleMessage(message) {
alert(message.nativeEvent.data);
}
render() {
return (
<WebView
source={{ uri: "https://website.com/" }}
injectedJavaScript="window.postMessage(document.title)"
onMessage={this.handleMessage}
/>
)
}
Now I want to monitor the title for changes and call a function as soon as this happens. How can I do this?
javascript react-native onchange
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
add a comment |
I basically try to call a function in react native as soon as the document title in my webview changes. I already get the document.title of the web page that is shown in my webview by using this code:
handleMessage(message) {
alert(message.nativeEvent.data);
}
render() {
return (
<WebView
source={{ uri: "https://website.com/" }}
injectedJavaScript="window.postMessage(document.title)"
onMessage={this.handleMessage}
/>
)
}
Now I want to monitor the title for changes and call a function as soon as this happens. How can I do this?
javascript react-native onchange
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
add a comment |
I basically try to call a function in react native as soon as the document title in my webview changes. I already get the document.title of the web page that is shown in my webview by using this code:
handleMessage(message) {
alert(message.nativeEvent.data);
}
render() {
return (
<WebView
source={{ uri: "https://website.com/" }}
injectedJavaScript="window.postMessage(document.title)"
onMessage={this.handleMessage}
/>
)
}
Now I want to monitor the title for changes and call a function as soon as this happens. How can I do this?
javascript react-native onchange
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
I basically try to call a function in react native as soon as the document title in my webview changes. I already get the document.title of the web page that is shown in my webview by using this code:
handleMessage(message) {
alert(message.nativeEvent.data);
}
render() {
return (
<WebView
source={{ uri: "https://website.com/" }}
injectedJavaScript="window.postMessage(document.title)"
onMessage={this.handleMessage}
/>
)
}
Now I want to monitor the title for changes and call a function as soon as this happens. How can I do this?
javascript react-native onchange
javascript react-native onchange
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
asked Aug 15 '18 at 17:45
Nixen85Nixen85
309213
309213
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I came here looking for a solution to the same problem but couldn't find one on stackoverflow. My exact requirement was to read the title from WebView and update it on a text box somewhere else and this is how I solved it,
My injected javascript monitors changes in the URL within WebView and calls postMessage whenever there is a change.
Here is my injected script:
window.currentloc = location.href;
setInterval(function() {
if (window.currentloc != location.href) {
window.currentloc = location.href;
window.postMessage('$#doctitle-' + document.title);
}
}, 500);
I also prefixed my message with $#doctitle- to avoid processing all messages coming from my WebView.
My component looks like this:
<WebView
ref={r => (this.webview = r)}
style={{ flex: 1 }}
injectedJavaScript="window.currentloc = location.href;setInterval(function() {if (window.currentloc != location.href) {window.currentloc = location.href;window.postMessage('$#doctitle-' + document.title);}}, 500);"
javaScriptEnabled={true}
onMessage={this.handleMessage.bind(this)}
onNavigationStateChange={this.onNavigationStateChange.bind(this)}
source={{
uri: 'https://website.com',
}}
/>
My message handler code:
handleMessage(event) {
if(event.nativeEvent.data && event.nativeEvent.data.indexOf("$#doctitle-")==0){
this.setState({
windowTitle: event.nativeEvent.data.split('-')[1]
});
}
}
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I came here looking for a solution to the same problem but couldn't find one on stackoverflow. My exact requirement was to read the title from WebView and update it on a text box somewhere else and this is how I solved it,
My injected javascript monitors changes in the URL within WebView and calls postMessage whenever there is a change.
Here is my injected script:
window.currentloc = location.href;
setInterval(function() {
if (window.currentloc != location.href) {
window.currentloc = location.href;
window.postMessage('$#doctitle-' + document.title);
}
}, 500);
I also prefixed my message with $#doctitle- to avoid processing all messages coming from my WebView.
My component looks like this:
<WebView
ref={r => (this.webview = r)}
style={{ flex: 1 }}
injectedJavaScript="window.currentloc = location.href;setInterval(function() {if (window.currentloc != location.href) {window.currentloc = location.href;window.postMessage('$#doctitle-' + document.title);}}, 500);"
javaScriptEnabled={true}
onMessage={this.handleMessage.bind(this)}
onNavigationStateChange={this.onNavigationStateChange.bind(this)}
source={{
uri: 'https://website.com',
}}
/>
My message handler code:
handleMessage(event) {
if(event.nativeEvent.data && event.nativeEvent.data.indexOf("$#doctitle-")==0){
this.setState({
windowTitle: event.nativeEvent.data.split('-')[1]
});
}
}
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
add a comment |
I came here looking for a solution to the same problem but couldn't find one on stackoverflow. My exact requirement was to read the title from WebView and update it on a text box somewhere else and this is how I solved it,
My injected javascript monitors changes in the URL within WebView and calls postMessage whenever there is a change.
Here is my injected script:
window.currentloc = location.href;
setInterval(function() {
if (window.currentloc != location.href) {
window.currentloc = location.href;
window.postMessage('$#doctitle-' + document.title);
}
}, 500);
I also prefixed my message with $#doctitle- to avoid processing all messages coming from my WebView.
My component looks like this:
<WebView
ref={r => (this.webview = r)}
style={{ flex: 1 }}
injectedJavaScript="window.currentloc = location.href;setInterval(function() {if (window.currentloc != location.href) {window.currentloc = location.href;window.postMessage('$#doctitle-' + document.title);}}, 500);"
javaScriptEnabled={true}
onMessage={this.handleMessage.bind(this)}
onNavigationStateChange={this.onNavigationStateChange.bind(this)}
source={{
uri: 'https://website.com',
}}
/>
My message handler code:
handleMessage(event) {
if(event.nativeEvent.data && event.nativeEvent.data.indexOf("$#doctitle-")==0){
this.setState({
windowTitle: event.nativeEvent.data.split('-')[1]
});
}
}
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
add a comment |
I came here looking for a solution to the same problem but couldn't find one on stackoverflow. My exact requirement was to read the title from WebView and update it on a text box somewhere else and this is how I solved it,
My injected javascript monitors changes in the URL within WebView and calls postMessage whenever there is a change.
Here is my injected script:
window.currentloc = location.href;
setInterval(function() {
if (window.currentloc != location.href) {
window.currentloc = location.href;
window.postMessage('$#doctitle-' + document.title);
}
}, 500);
I also prefixed my message with $#doctitle- to avoid processing all messages coming from my WebView.
My component looks like this:
<WebView
ref={r => (this.webview = r)}
style={{ flex: 1 }}
injectedJavaScript="window.currentloc = location.href;setInterval(function() {if (window.currentloc != location.href) {window.currentloc = location.href;window.postMessage('$#doctitle-' + document.title);}}, 500);"
javaScriptEnabled={true}
onMessage={this.handleMessage.bind(this)}
onNavigationStateChange={this.onNavigationStateChange.bind(this)}
source={{
uri: 'https://website.com',
}}
/>
My message handler code:
handleMessage(event) {
if(event.nativeEvent.data && event.nativeEvent.data.indexOf("$#doctitle-")==0){
this.setState({
windowTitle: event.nativeEvent.data.split('-')[1]
});
}
}
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
I came here looking for a solution to the same problem but couldn't find one on stackoverflow. My exact requirement was to read the title from WebView and update it on a text box somewhere else and this is how I solved it,
My injected javascript monitors changes in the URL within WebView and calls postMessage whenever there is a change.
Here is my injected script:
window.currentloc = location.href;
setInterval(function() {
if (window.currentloc != location.href) {
window.currentloc = location.href;
window.postMessage('$#doctitle-' + document.title);
}
}, 500);
I also prefixed my message with $#doctitle- to avoid processing all messages coming from my WebView.
My component looks like this:
<WebView
ref={r => (this.webview = r)}
style={{ flex: 1 }}
injectedJavaScript="window.currentloc = location.href;setInterval(function() {if (window.currentloc != location.href) {window.currentloc = location.href;window.postMessage('$#doctitle-' + document.title);}}, 500);"
javaScriptEnabled={true}
onMessage={this.handleMessage.bind(this)}
onNavigationStateChange={this.onNavigationStateChange.bind(this)}
source={{
uri: 'https://website.com',
}}
/>
My message handler code:
handleMessage(event) {
if(event.nativeEvent.data && event.nativeEvent.data.indexOf("$#doctitle-")==0){
this.setState({
windowTitle: event.nativeEvent.data.split('-')[1]
});
}
}
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
answered Jan 4 at 12:10
MuthukrishnanMuthukrishnan
486411
486411
add a comment |
add a comment |
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