I discovered, to my dismay, that mobile browsers seem to have a different character limit than desktop browsers for JavaScript prompt() input. How can I work around it to input my long string on mobile? Here's a nice page for testing: https://javascript.info/alert-prompt-confirm#a-simple-page I used printf '%s ' {1..1250} to generate a suitable test string. Please find the resulting 5142-character string below.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250

On a Mac desktop's Chrome, the website accepts this input, no problem. On Android, it cuts off the input in the middle of 1222, at 5000 characters, and I'm unable to type more. I've tried Brave, DuckDuckGo, Firefox, Chrome, and Opera. The behavior is the same in all these mobile browsers. Changing to the desktop layout in the browser settings has no effect.

I have an offline saved htm web page on sdcard to test Javascript. The default render on my phone seems to be HTML Viewer. But when I tried to open the page, the code didn't run. I know this because there's some html tag in the page I was added to detect this: /* my Javascripts */ The current browser can't run Javascript. which displays on the page: "The current browser can't run Javascript." So how can I enable Javascript in HTML Viewer? Both Opera and Browser are somehow can't found out the file when I typed in the address textbox: file://localhost/sdcard/page.htm The problem exist on almost any phone. But the later just works on some of my phone. Another not.

In an effort to reduce my data consumption, I want to view webpages, specifically webpages with logins and forms, in text-only mode. These pages usually require JavaScript, it seems. I want very basic text-only mode. The browser "low-data/no images" options don't quite cut it for my goal of stretching 500MB over a month with frequent use. Right now, I am using a mix of DuckDuckGo Lite, Textise, and Lynx in Termux for Android to bring my data consumption down to a minimum, but this doesn't work with websites that require JavaScript. Does anyone know how I can accomplish having JavaScript enabled while still using very little bandwidth?

I want to quickly try some JavaScript code on an Android phone. I cannot find how to open the console or something similar on either Chrome or the default browser. about:debug doesn't do anything, and I don't want "remote debugging". I can download another app if necessary (but I don't want to root my device).

I have this file: /storage/emulated/0/Tones/test1/test2/test3/test4/brooke-shields,-a�os-80.jpg Cannot delete. I get a response when I try to delete using several different file managers. My phone is unrooted. Tried through javascript, termux, iShredder, and others. Have tried to understand the black diamond with the question mark, but unclear what it truly is. Am a real novice, so have patience. Any suggestions on how to delete this file.

Is it possible to call a Javascript function that exists within a WebView from Tasker? I tried calling a URL on the WebView of "javascript:FUNCTION_NAME()", but that did not seem to work. This is a completely random example. Lets say, from Tasker, that I want to be able to change the background color of the body of the WebView. In the webview, I have the code function ChangeBGColor(NewColor) { document.body.style.backgroundColor=NewColor; } I want to be able to call ChangeBGColor() from Tasker with a color.

I would like to be able to use userscripts in Android. Is this even possible? I read that it was a couple months back and tried a tutorial which I can no longer find but it didn't work. This question may be related to this other one I submitted but I believe they may have totally different answers.

I maintain shows, and films from several platforms within an OrgMode File. Now the string you get when sharing from netflix has unnecessary information. I get rid of that with Tasker and a Java Scriptlet.

var endName = astext.search(" auf Netflix gesehen?") -1;
var text = astext.slice(15,endName);
endName = endName+24;
var replacer = astext.slice(0,endName);
var link = String(astext.replace(replacer));

With

as input source from AutoShare Netflix Toast Interception. So far so good, but as I have actually never used JavaScript before I get to a problem I don't really understand. Infront of my string stored in

there is "undefinded" prepended. I don't really know if I mess up JavaScript syntax or if there is something special with the interpreter Tasker is using. This also happens if I instead of "resharing" the link simply print it out via

Task in Tasker

I have a webapp I frequently use, which have such kind of forms:

What I want to do is to be able to autofill those fields with specified values (e.g.: urname=kristian, secretid=abcdefghijkl, otherfield=000111222333444555666777888999). Currently I do it by opening "note" app then copy-pasting its content each time, which can get tedious since it's quite long and I have to go back and forth 3 times. Also, the content of the autofill input is not exactly a secret. Is there a way to do it? I found a question with similar problem on Super User: [Autofill web forms](https://superuser.com/questions/1242775/autofill-web-forms) (but instead of Chrome on PC I want to do it in Chrome in Android). The comments seems to recommend a Cchrome extension that can inject JavaScript into the page. I don't mind that, I can write JS, but I don't think Chrome extensions are available on Android. EDIT: I found here that I can execute bookmarked JS via chrome without extensions here: https://android.stackexchange.com/questions/159308/how-can-a-bookmarklet-be-added-on-mobile-chrome-without-copying-and-pasting/210701 So I made a bookmark with such content:

javascript:(function(){ document.querySelector(#urname).value=kristian; document.querySelector(#secretid).value=abcdefghijkl ; document.querySelector(#otherfield).value=000111222333444555666777888999 ; })()

Which if it gets prettified/formatted it will looks like:

javascript:(function(){
  document.querySelector(#urname).value=kristian;
  document.querySelector(#secretid).value=abcdefghijkl ;
  document.querySelector(#otherfield).value=000111222333444555666777888999 ; 
})()

But I still have problem: the page seems to use some kind of data binding (e.g.: react two-way binding). So when the value got changed via JS, when I click on the element it goes back to its old (empty) value. Now, how should I circumvent it?

Sometimes I need to disable Javascript on some webpages for various reasons. From a rather old post on Mozilla Support and some other sources, I learned that it is done through

:config

. However, from the answer on this question on SE Android, I learned that

:config

is no longer accessible on the stable version of Firefox for Android. So I am back to the square 1, how do I disable Javascript in Firefox on Android? I have the following constraints in roughly the order of decreasing concern. Please keep these constraints in consideration while answering the question, but I am still welcome to learn about solutions that violate some of these constraints. 1. I do not want to use nightly or beta versions. They might have security vulnerabilities or unexpected behavior. 2. I do not want to change any Firefox configuration files on the file system, unless from within Firefox. I don't know much about Android application and I am afraid I might break something while messing with files. 3. I do not want to install any add-on on Firefox unless it is opensource or is widely known to be trustworthy.

I recently became very suspicious of apps.  And a few questions have occupied my mind, please help me 1. Is there any way that an application can access the camera without having the camera permission in the settings? (Android 9 and above) 2. Can an app use intent to use the camera without the user's knowledge? (And take photos and videos of the user?)

On my Android phone, how can a user add a bookmarklet to my Chrome bookmarks, *without needing to use another device, and without copying and pasting?* I have a bookmarklet on my website that I want *other people* to add to their bookmarks, so I'm looking for a straightforward method. Bookmarklets are bookmarks, but of which contain Javascript code instead of a regular web link. Bookmarklets can be added to Chrome on the PC very easily in many ways. - However, on Android, if the bookmarklet is displayed as a link on a page, it cannot be "dragged to the bookmark bar" as with a PC. - If I try to open it in a new tab, the address bar will not contain the Javascript, so the user can't use the bookmark button. - Tapping the link to the bookmarklet will not put the code in the address bar either. - The only way I've been able to add a bookmarklet on my phone has been to tap and hold on the link, then tap "Copy link address", then edit a *pre-existing* bookmark's link and pasting in the bookmarklet code, then renaming said bookmark. But that's a pain, and trying to explain it to non tech savy folks isn't happening. Is there a more simple method? Note that I have a particular bookmarklet that even when added on my PC, does NOT sync to my Phone's bookmarks. I believe it may be due to the length (It's over 9000 characters!). This is why I need an easy method for users to save this bookmarklet.

I'm searching a way on how to change behavior of some website in mobile browser. For example: * Remove annoing Ad (specific one) * Change some elements on a website, to make it easier to read on small screen (change some css) * Make site measure how much time I've spent on it, and "block" me from using it more time per day than I've configured. On desktop browser I'm usually solving this tasks by using extensions like TamperMonkey/GreasyMonkey (which allows me to add custom JavaScript code to page and do what I want on the page), StayFocusd (to limit distractions) and so on. But most of mobile browsers doesn't have extensions (and it's understandable because they often writen poorly and could eat too much CPU on not-so-powerfull device). To be honest, Firefox for Android has addons but there are very few. Just adblocking, privacy and some bugfixing extensions. No TamperMonkey/GreasyMonkey analog. Also, I know, that UCBrowser has it's extension store, but my Chineese is bad, and the store is all on Chinesse :) **I came to the folowing idea:** 1. Setup my own DNS server and configure my Android to use it (now it's possible without root) 2. Setup my own squid proxy server 3. Create self-signed SSL-certificate and add it to my Android's certificates storage. 4. For sites where I want to make some augmentations, my DNS should give IP-address of my squid-proxy (which is using my self-signed cert or generating cerificated for needed sites, signed by my self-created authority certificate) 5. The proxy should be loading the real site, and patch it's html files, adding my JavaScript file into it. 6. So I would be able to change parts of the sites, removing ads, measure time spend and so on. Everything is possible! I have knowledge and skills to make all of the described steps (or it seems so), **BUT!** I don't have enough free time. I want to know, maybe there are something like this implemented in a single service? Or maybe you could direct me to some easier solution of the problem?

When any site has mixed content (HTTPS + HTTP), and when you try to open HTTP content, on Desktop chrome, it shows a "shield" icon like screen below, This allow user to load unsafe script. However, the above option is not coming or not available when i open the same page in Android phone's chrome browser. My chrome app version is 71.0.3578.99 Any idea how to get above pop-up in android chrome to allow user to load unsafe scripts?

Can I connect an external flashlight to an Android smartphone and control it? I've seen it done on an iPhone ([YouTube video](https://www.youtube.com/watch?v=iq6Xiums05o&t=04m04s)) . If it's possible, can it be done also via JavaScript?

Can I make these work on Android or is there a google place to create or convert bookmarklets to make them Android Compatible?

I had written a custom HTML/javascript application and wanted to run it in a android browser on my Redmi Note4. Firstly I activated javascript in all the browsers (MIUI default browser,chrome,firefox).Then,I tried opening the file directly from the file manager,but it only loaded html but not javascript. Afterthat ,I pasted the file path > content://com.mi.android.globalFileexplorer.myprovider/external_files/... in the browser but even in this case only html was recognised but not javascript.However as seen from this forum thread here ,this solution has worked on other phones. Is there any way to detect javascript in MIUI10 OS?

I have a Google Form that I use for daily tracking and I would like to have a shortcut to this form on my home screen. One field of this form is for the date and I would like to have it pre-filled with today's date. To do so, I can pass a query string to the URL, that will end up looking like: https://docs.google.com/forms/d/e//viewform?entry.=YYYY-MM-DD Since today's date is not the same as tomorrow's (yay!), this URL needs to be updated every day with a different YYYY-MM-DD. I followed this post and has been able to create a bookmark with a dynamic URL using JavaScript, on Chrome Desktop: [How to create a dynamic bookmark with today’s date in the URL](https://trendblog.net/how-to-create-a-dynamic-bookmark-with-todays-date-in-the-url/) , but I would also like to have it on my phone. I came across [this answer](https://android.stackexchange.com/a/156135/269083) , where it shows how to use JavaScript to change the current page. However, when applied to my case, it will compute the date before creating the URL, so this URL is not dynamic. Is there a _"native"_ way to achieve this? My other option for the moment would be having a local HTML page that redirects to the form.

I'm trying to stream music from The Hype Machine on my HTC Desire. When using the HTC Sense stock browser I can press play, go to menu → ... → settings → site specific settings → back out until l I arrive at the site again Only then the music will start playing. If I activate the key lock or take the focus away in any other way, the sound will stop. When using Opera Mobile I can't seem to get the sound to work at all. Looking at the site's source the streaming is done with Javascript (mootools). On my desktop I don't get any javascript errors and the site works perfectly fine. Can anybody tell me why I have to jump through such hoops with the stock browser to get the sound going, how I can have the browser keep playing in the background or with the key lock on or why the sound doesn't seem to work in the otherwise nice Opera Mobile?

While trying to login my Hackerearth account it put up a disclaimer that my cookies are disabled.Plus many times,many web pages tell me the same thing,and yeah,also ask me to enable JavaScript on my phone. I own an HTC desire 620g.Unsure if that was necessary though