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The HTML DOM input radio required property is associated with the required attribute of an element. The required property is used for setting and returning if it is necessary to check some radio button or not before the form is submitted to the server. This allows the form to not submit if a radio button with required attribute is left unchecked by the user.SyntaxFollowing is the syntax for −Setting the required property.radioObject.required = true|falseHere, true represents the radio button must be checked while false represents its optional to check the radio button before submitting the form.ExampleLet us look at ... Read More
The HTML DOM Video src property returns/sets a string corresponding to the url of the video.SyntaxFollowing is the syntax −Returning string valuemediaObject.srcSetting src to a URLStringmediaObject.poster = URLStringLet us see an example of HTML DOM Video src property −Example Live Demo HTML DOM Video src * { padding: 2px; margin:5px; } form { width:70%; margin: 0 auto; text-align: center; } input[type="button"] { border-radius: 10px; } ... Read More
The HTML DOM Video textTracks property returns a TextTrackList object containing information about the text tracks for the video.SyntaxFollowing is the syntax −Returning TextTracksList ObjectmediaObject.textTracksLet us see an example of Video textTracks property −Example Live Demo HTML DOM Video textTracks * { padding: 2px; margin:5px; } form { width:70%; margin: 0 auto; text-align: center; } input[type="button"] { border-radius: 10px; } HTML-DOM-Video-textTracks ... Read More
The HTML DOM Video volume property returns/sets a number corresponding to current volume level of media.SyntaxFollowing is the syntax −Returning volume as a numbermediaObject.volumeSetting volume to a numbermediaObject.volume = numberNOTE: Number has a max value of ’1.0’ and if ‘0.0’ video volume is min.Let us see an example of Video volume property −Example Live Demo HTML DOM Video volume * { padding: 2px; margin:5px; } form { width:70%; margin: 0 auto; text-align: center; } input[type="button"] { ... Read More
The HTML DOM Video width property returns/sets a number corresponding to width (in pixels) of media.SyntaxFollowing is the syntax −Returning width as a number (px)mediaObject.widthSetting width to a number (px)mediaObject.width = numberLet us see an example of Video width property −Example Live Demo HTML DOM Video width * { padding: 2px; margin:5px; } form { width:70%; margin: 0 auto; text-align: center; } input[type="button"] { border-radius: 10px; } ... Read More
The HTML DOM localStorage Properties enables user to store key-value pairs in local browser itself for future reference. Key-value pairs are not lost until explicitly removed/cleared.SyntaxFollowing is the syntax −Window.localStorageHere, localStorage can have following properties/methods −setItem(‘key’, ’value’)getItem(‘key’)removeItem(‘key’)Let us see an example of localStorage properties −Example Live Demo LocalStorage clear() form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } table, th, td { ... Read More
The HTML DOM Window stop() provides user the functionality to stop loading the resources of a window without clicking the browser stop button.SyntaxFollowing is the syntax −window.stop()ExampleLet us see an example of HTML DOM Window stop() method − HTML DOM Window stop() * { padding: 2px; margin:5px; } form { width:70%; margin: 0 auto; text-align: center; } input[type="button"] { border-radius: 10px; ... Read More
A web service is any piece of software which offers service to other systems. It makes itself available over the internet and uses a standardized XML or, JSON messaging system. A web service enables communication among various applications by using open standards such as HTML, XML, WSDL, and SOAP.IISIIS stands for, Internet Information Services, it is a web service software create by Microsoft. It is available with the Windows (NT) operating systems, it supports HTTP, HTTP/2, HTTPS, FTP, FTPS, SMTP and NNTP.Here we are going to discuss how create and launch a web service locally and send request to it.Installing ... Read More
By default, the shape of legend is circular but we can change it by using the guides function of ggplot2 package. For example, if we have a data frame with two numerical columns say x and y, and one categorical column Group then the scatterplot between x and y for different color values of categories in categorical column Group having different shape of legends can be created by using the below command −ggplot(df, aes(x, y, color=Group))+geom_point()+guides(colour=guide_legend(override.aes=list(shape=0)))Here, we can change the shape argument value to any value between starting from 0 to 25.Consider the below data frame −Example Live DemoxRead More
When we do subsetting with the help of single square brackets we need to be careful about putting the commas at appropriate places. If we want to subset rows using the columns then comma needs to be placed before the condition. The “undefined columns selected” error occurs when we do not specify any comma. Check out the examples to understand how it works.Consider the below data frame −Example Live Demox15),]Output x1 x2 1 7 0 2 6 4 4 6 1 7 6 1 9 7 3 11 6 3 12 9 2 15 7 4 16 7 3 17 6 2 18 6 3Example Live Demoy1