Change xml attribute value in javascript

Sets the value of an attribute on the specified element. If the attribute already exists, the value is updated; otherwise a new attribute is added with the specified name and value. To get the current value of an attribute, use getAttribute ; to remove an attribute, call removeAttribute. Boolean attributes are considered to be true if they're present on the element at all, regardless of their actual value ; as a rule, you should specify the empty string "" in value some people use the attribute's name; this works but is non-standard.

See the example below for a practical demonstration. Since the specified value gets converted into a string, specifying null doesn't necessarily do what you expect. Instead of removing the attribute or setting its value to be nullit instead sets the attribute's value to the string "null". If you wish to remove an attribute, call removeAttribute.

In the following example, setAttribute is used to set attributes on a element represents a clickable button, used to submit forms or anywhere in a document for accessible, standard button functionality. Using setAttribute to modify certain attributes, most notably value in XUL, works inconsistently, as the attribute specifies the default value. To access or modify the current values, you should use the properties. For example, use Element. Get the latest and greatest from MDN delivered straight to your inbox.

Sign in to enjoy the benefits of an MDN account. Syntax Element. Any non-string value specified is converted automatically into a string. Return value undefined. Exceptions InvalidCharacterError The specified attribute name contains one or more characters which are not valid in attribute names. Example In the following example, setAttribute is used to set attributes on a element represents a clickable button, used to submit forms or anywhere in a document for accessible, standard button functionality.

You can see this using your browser's page inspector ChromeEdgeFirefoxSafari. To set the value of a Boolean attribute, such as disabledyou can specify any value. An empty string or the name of the attribute are recommended values.

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All that matters is that if the attribute is present at all, regardless of its actual valueits value is considered to be true.

The absence of the attribute means its value is false.The setAttribute method adds the specified attribute to an element, and gives it the specified value. Note: Although it is possible to add the style attribute with a value to an element with this method, it is recommended that you use properties of the Style object instead for inline styling, because this will not overwrite other CSS properties that may be specified in the style attribute:.

Tip: Use the removeAttribute method to remove an attribute from an element. Tip: See also the setAttributeNode method. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:.

Bad: element. Good: element. Example Change an input field to an input button: document. Example Add a href attribute with a value of "www.

Go to w3schools. HOW TO. Your message has been sent to W3Schools. W3Schools is optimized for learning, testing, and training. Examples might be simplified to improve reading and basic understanding. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.

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It only takes a minute to sign up. With xmlstarlet it just becomes an XPath exercise:. It's better to use an XML parser to process XML since the order of the attributes can change and line breaks could be inserted resulting in the name and branch attributes being in different lines of the file.

Now I know there are a lot of people out here with far more knowledge on the art that is awk and sed, so I'm prepared for some criticism If you don't have access to xmllint or xmlstarlet on your machine. Make sure to transform your xml to one line before using grep like this. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 9 months ago. Active 4 months ago. Viewed 4k times. John John 83 1 1 silver badge 3 3 bronze badges.

I guess I'll leave this here. Active Oldest Votes. This is the better answer since it will continue to work even after someone decided to change the order of the attributes.

I agree; just use an XML parser! DavidConrad make that an answer. RonJohn Done. I also decided to change it to an absolute XPath. David Conrad David Conrad 2 2 silver badges 5 5 bronze badges. Freddy Freddy Wonderful solution, I learn every day. Parsing XML using grep is asking for trouble. What if the order of the attributes changes?

What if there's some other non- blah1 element that has similar attributes? Also, why -i? XML element and attribute names are case-sensitive.

Now, all of these things are bugs waiting to surface at some point in the future. I recommend using the proper tool for the job; an XML parser. The -i is taken from OP and could be handy to handle the attribute values Roger, Steven.To search for information in the Help, type a word or phrase in the Search box. When you enter a group of words, OR is inferred. You can use Boolean operators to refine your search.

Results returned are case insensitive. However, results ranking takes case into account and assigns higher scores to case matches.

Add, Change, and Remove Attributes with jQuery

Therefore, a search for "cats" followed by a search for "Cats" would return the same number of Help topics, but the order in which the topics are listed would be different. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase. This method returns the value of the target attribute. The method returns the string value of the target attribute or returns null if the method cannot find an attribute value.

Send Help Center feedback. To open the configured email client on this computer, open an email window. Otherwise, copy the information below to a web mail client, and send this email to ovdoc-ITSM hpe. Home Release notes What's new in Service Manager 9. All Files. Searching the Help To search for information in the Help, type a word or phrase in the Search box.

XML Basics -- for Beginners

You will also find its grammatical variations, such as "cats". A phrase. You can specify that the search results contain a specific phrase. Service Manager 9. Topics that contain the word "cat". Topics that contain the literal phrase "cat food" and all its grammatical variations.

Two or more words in the same topic. OR or pipe. NOT not! NOT cat!Attributes can be used to control the XML serialization of an object or to create an alternate XML stream from the same set of classes. By default, an XML element name is determined by the class or member name. This default behavior can be changed if you want to give the element a new name.

The following code shows how an attribute enables this by setting the ElementName property of a XmlElementAttribute. For more information about attributes, see Attributes.

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You can also specify the types that can be included in an array. The XmlArrayAttribute will determine the properties of the enclosing XML element that results when an array is serialized. For example, by default, serializing the array below will result in an XML element named Employees.

The Employees element will contain a series of elements named after the array type Employee. The XmlArrayItemAttributeon the other hand, controls how the items contained in the array are serialized. Note that the attribute is applied to the field returning the array.

change xml attribute value in javascript

Another use of the XmlArrayItemAttribute is to allow the serialization of derived classes. For example, another class named Manager that derives from Employee can be added to the previous example. If you do not apply the XmlArrayItemAttributethe code will fail at run time because the derived class type will not be recognized.

To remedy this, apply the attribute twice, each time setting the Type property for each acceptable type base and derived. You can also serialize an array as a flat sequence of XML elements by applying a XmlElementAttribute to the field returning the array as follows. When no attribute is applied to the field, the schema describes the element in the following manner.

When the XmlElementAttribute is applied to the field, the resulting schema describes the element as follows.

change xml attribute value in javascript

The ArrayList class can contain a collection of diverse objects. You can therefore use a ArrayList much as you use an array. Instead of creating a field that returns an array of typed objects, however, you can create a field that returns a single ArrayList.

However, as with arrays, you must inform the XmlSerializer of the types of objects the ArrayList contains. To accomplish this, assign multiple instances of the XmlElementAttribute to the field, as shown in the following example.

change xml attribute value in javascript

These attributes are very similar. The XmlRootAttribute can be applied to only one class: the class that, when serialized, represents the XML document's opening and closing element—in other words, the root element. The XmlTypeAttributeon the other hand, can be applied to any class, including the root class.

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For example, in the previous examples, the Group class is the root class, and all its public fields and properties become the XML elements found in the XML document. Therefore, there can be only one root class. For example, you can change the element name and namespace. This capability is useful when you need to publish the schema through an XML Web service.

There might be situations when a public property or field does not need to be serialized. For example, a field or property could be used to contain metadata. In such cases, apply the XmlIgnoreAttribute to the field or property and the XmlSerializer will skip over it.

You may also leave feedback directly on GitHub. Skip to main content. Exit focus mode. Is this page helpful?This chapter describes the XML attributes. Attributes are part of XML elements.

An element can have multiple unique attributes. Attribute gives more information about XML elements. To be more precise, they define properties of elements.

An XML attribute is always a name-value pair. Here, attribute1 and attribute2 are unique attribute labels. Attributes are used to add a unique label to an element, place the label in a category, add a Boolean flag, or otherwise associate it with some string of data. Attributes are used to distinguish among elements of the same name, when you do not want to create a new element for every situation.

Hence, the use of an attribute can add a little more detail in differentiating two or more similar elements. In the above example, we have categorized the plants by including attribute category and assigning different values to each of the elements. Hence, we have two categories of plantsone flowers and other shrubs. Thus, we have two plant elements with different attributes. This is a more constrained type.

JavaScript method: XML.getAttributeValue()

The validity constraints noted in the grammar are applied after the attribute value is normalized. This has a list of predefined values in its declaration. XML - Attributes Advertisements. Previous Page. Next Page. Previous Page Print Page. It takes any literal string as a value. CDATA is character data.

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This means, any string of non-markup characters is a legal part of the attribute.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. But this does not changes the actual DB. When I refresh my page, it gives me the same old value again. I am making changes only on the client page and not sending the data back to make relevant changes in database itself. I understand I should use AJAX or something, but could you please give me directions on what I should read or some examples where I can learn?

Obviously that is destroyed when the JS instance restarts reloading the page or you re-load from the original file.

change xml attribute value in javascript

NET, Ruby on Rails, etc. That code executes on the server, not in the browser.

Hello World

A List Apart has a good resource for getting started. The simplest model that comes to mind is using AJAX to send the complete, modified XML chunk to server-side code, which simply saves it. If you are dealing with huge files and frequent updates, you may want to consider using AJAX to send manipulation instructions to the server-side code, which execute the changes and save the file. You've told us basically no relevant info, but most likely you're just changing the client page, and making no effort to send back e.

You need to save db after changes. Learn more. Ask Question. Asked 10 years, 10 months ago. Active 10 years, 10 months ago.

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Viewed 8k times. I tried using: xmlDoc. What am I doing wrong? Edit: I am making changes only on the client page and not sending the data back to make relevant changes in database itself. Zeeshan Rang Zeeshan Rang How are you writing the change to the "db"? The value you are changing in that try is merely a copy that has been loaded into your program and not the real data would be my guess. The changes are just in client page. I did not knew about that. So, can you suggest what should i do to make changes in the XML itself.

My XML file is probably not going to be very huge, but still it would be records long. Active Oldest Votes. Rex M Rex M k 28 28 gold badges silver badges bronze badges. THanks Rex. I believe i have to read about AJAX first to do this. Matthew Flaschen Matthew Flaschen k 40 40 gold badges silver badges bronze badges. Tolgahan Albayrak Tolgahan Albayrak 2, 1 1 gold badge 19 19 silver badges 26 26 bronze badges.


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