Javascript Browser Download Progress
Malvina Mago
what could be the reason if browser is showing progress bar (stuck at half) as if it is still trying to load something, even after the page is rendered. this is an intranet ASP.NET website. how can I find out the reason? the browser is IE8. actually this started after the browser is upgraded from IE6 to IE8. not sure if this issue has anything to do with browser upgrade. will the tools like Fiddler can help to find out what it is still trying to load? thanks in advance.
I'm creating a simple search functionality on a bunch of htmls. I have used simple string utilities in javascript/jQuery to achieve it and it came out good. I create a json string with all the results while processing htmls one by one. On the go I populate the results in a Div by appending the results and it is navigable on click. The problem am facing is the results populated so far are not clickable since the browser not responding until all the results are being processed and entire json is created. After the whole process is finished am able to click and navigate correctly. Any idea why browser hanging/not responding on this javascript process.??
Javascript only runs on a single processor thread, meaning it can only actually do 1 thing at a time. However, javascript can sometimes act like it does more than 1 thing at a time by switching between tasks really quickly. You are experiencing that behavior because you have the thread locked until it completely loads the results.
In Safari, the progress bar doesn't get updated (the loop executes, and we can even see that the value of progressBar is being updated by printing console.log(progressBar.value), but that change doesn't get reflected in the UI).
This attribute describes how much work the task indicated by the progress element requires. The max attribute, if present, must have a value greater than 0 and be a valid floating point number. The default value is 1.
This attribute specifies how much of the task that has been completed. It must be a valid floating point number between 0 and max, or between 0 and 1 if max is omitted. If there is no value attribute, the progress bar is indeterminate; this indicates that an activity is ongoing with no indication of how long it is expected to take.
Note: The :indeterminate pseudo-class can be used to match against indeterminate progress bars. To change the progress bar to indeterminate after giving it a value you must remove the value attribute with element.removeAttribute('value').
In most cases you should provide an accessible label when using . While you can use the standard ARIA labelling attributes aria-labelledby or aria-label as you would for any element with role="progressbar", when using you can alternatively use the element.
If the element is describing the loading progress of a section of a page, use aria-describedby to point to the status, and set aria-busy="true" on the section that is being updated, removing the aria-busy attribute when it has finished loading.
In most cases you should provide an accessible label when using . While you can use the standard ARIA labelling attributes aria-labelledby or aria-label as you would for any element with role=\"progressbar\", when using you can alternatively use the element.
If the element is describing the loading progress of a section of a page, use aria-describedby to point to the status, and set aria-busy=\"true\" on the section that is being updated, removing the aria-busy attribute when it has finished loading.
A 64-bit unsigned integer representing the total amount of work that the underlying process is in the progress of performing. When downloading a resource using HTTP, this is the Content-Length (the size of the body of the message), and doesn't include the headers and other overhead.
In this example, a simple HTML page simulates the content of a blog page. As the reader scrolls the simulated blog post, the browser script uses the SDK for JavaScript to record the scroll distance down the page and send that data to Kinesis using the putRecords method of the Kinesis client class. The streaming data captured by Amazon Kinesis Data Streams can then be processed by Amazon EC2 instances and stored in any of several data stores including Amazon DynamoDB and Amazon Redshift.
Create an Kinesis stream. You need to include the stream's resource ARN in the browser script. For more information about creating Amazon Kinesis Data Streams, see Managing Kinesis Streams in the Amazon Kinesis Data Streams Developer Guide.
Create an Amazon Cognito identity pool with access enabled for unauthenticated identities. You need to include the identity pool ID in the code to obtain credentials for the browser script. For more information about Amazon Cognito identity pools, see Identity Pools in the Amazon Cognito Developer Guide.
The HTML for the blog page consists mainly of a series of paragraphs contained within a element. The scrollable height of this is used to help calculate how far a reader has scrolled through the content as they read. The HTML also contains a pair of elements. One of these elements adds the SDK for JavaScript to the page and the other adds the browser script that captures scroll progress on the page and reports it to Kinesis.
Scroll progress is calculated using the scrollHeight and scrollTop properties of the containing the content of the blog post. Each scroll record is created in an event listener function for the scroll event and then added to an array of records for periodic submission to Kinesis.
Sometimes, when exporting Godot for the Web, it might be necessary to interface with external JavaScript code. Things like third-party SDKs, libraries, or simply accessing browser features that are not directly exposed by Godot.
One of the key elements of any modern website that you would have come across on the internet is an HTML progress bar. HTML5 progress elements have become a fundamental part of web design that is used for a wide array of tasks be it to display file download/upload status, file transfer, registration, installation or any task which is in progress due for completion. However, coding an HTML progress bar which offers cross browser compatibility has posed a tricky challenge to developers since time immemorial. Instead of using div tags to create a progress bar, HTML5 provides an extremely ingenious way by the use of HTML5 < progress > tag. In this article, we will discuss what HTML5 progress bar element is, how to style it using CSS, how to animate it using JavaScript/jQuery, cross browser compatibility solutions for creating an HTML progress bar and finally fallbacks for unsupported browsers. Without further ado, here we go!
The semantic HTML5 < progress > element is used as an indicator to display the state of completion or progress of a task, i.e. the amount of work which is yet to be done. HTML5 < progress > element acts as a visual feedback demonstration for a user to keep tabs on the state of progress of the given task being undertaken. Usually, it is displayed in the form of a HTML progress bar marked with numbers or percentage values.
As you can see above, the HTML5 Progress bar element is cross browser compatible across all major desktop and mobile browsers covering 97.45% of the Internet user base as of March 2019. The only major exception is IE9 and below versions. Later in the article, we will explore different ways to code necessary fallbacks to elevate our HTML progress bar cross browser compatibility by using a polyfill to add support for IE8-9.
If you wish to learn more about how modern browser work and Why Browsers Render Content Inconsistently, you can have a look at my previous article on Feature Detection For Cross Browser Compatibility.
Before moving on to browser specific rules, let us look at the basic HTML5 progress bar element selector first. We can use the progress selector(or progress[value] selector) to change the background colour, height and the border radius of the progress bar.
However, the background colour and border radius will not work with Google Chrome and other WebKit/Blink browsers as shown below. In fact, they will remove the default native styling and replace it with a green HTML progress bar and dark grey background. In Firefox, the background colour and border radius rules are applied to the outer HTML progress bar but not to the value. Microsoft Edge obeys all rules as intended.
Now, in order to create a cross browser compatible HTML progress bar with uniform appearance across all browsers, we need to target pseudo-classes for both Webkit browsers(Chrome, Opera and Safari) and Firefox.
Now using these WebKit and Mozilla firefox pseudo classes, we can finally create our basic HTML progress bar with light grey background(#777), light blue value progress part ( rgb(20, 240, 221) ), and rounded corners( border-radius: 20px ).
We can take our styling a step further to create an HTML progress bar with stripes and gradient background. Simply add -webkit-linear-gradient and -moz-linear-gradient styling rules to ::-webkit-progress-value and ::-moz-progress-bar pseudo classes.
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