Update Taxonomy Or Managed Metadata Field Via SharePoint JSOM

In this article, I am sharing code snippets to create List items and update items with Taxonomy or Managed Metadata field on a custom list. I have seen some threads on how to update the multi-value taxonomy fields also. The below code demonstrates both single/multi-valued, taxonomy column update snippets via JSOM.

Create List Item

function CreateItem(isSingleValue){
SP.SOD.executeOrDelayUntilScriptLoaded(function () {
'use strict';
var context = new SP.ClientContext(_spPageContextInfo.siteAbsoluteUrl);
var list = context.get_web().get_lists().getByTitle('CustomList');
var itemCreateInfo = new SP.ListItemCreationInformation();
var item = list.addItem(itemCreateInfo);
var field = list.get_fields().getByInternalNameOrTitle("MyMMDField");
var taxField = context.castTo(field, SP.Taxonomy.TaxonomyField);
if(isSingleValue == true){ // this you have to handle manually , use
var termValue = new SP.Taxonomy.TaxonomyFieldValue();
termValue.set_label("MyWikiTerm");
termValue.set_termGuid("fb58bc5e-5ce5-41fc-9a90-7431018aa935");
termValue.set_wssId(-1);
taxField.setFieldValueByValue(item, termValue);
item.set_item("Title", "Created New Item and Set single valued Taxonomy");
}
else { // this you have to handle manually
item.set_item("Title", "Created New Item and Multi valued Taxonomy");
var pairs = "-1;#MyWikiTerm|fb58bc5e-5ce5-41fc-9a90-7431018aa935;#-1;#MyWikiTerm2|1cee8427-41f1-4a2b-aff3-26c67685988e";
var termValueCollection = new SP.Taxonomy.TaxonomyFieldValueCollection(context,pairs,taxField);
taxField.setFieldValueByValueCollection(item, termValueCollection);
}
item.update();
context.load(item);
context.executeQueryAsync(
function () {
console.log('Item created sucessfully: ' + item.get_id());
},
function (sender, args) {
console.log("exception in addItem");
});
}, 'SP.Taxonomy.js');
}

Let us quickly test this via Chrome Developer Console.

Go to page and view site in the Classic experience.

Press F12. Go to Developer Console and paste the above code in the console.

Press Enter.

We should get an undefined logged-in console. Don't worry. Ignore this message.

Update Taxonomy Or Managed Metadata Field Via SharePoint JSOM

Now let us try this out, call this function in chrome console developer like below

If you get the above message, an item will be created in the list and the Taxonomy field would have been set. Please refer to the below screenshot for reference.

The same way, you can try multi-value also by passing the parameter as false in the CreateItem method.

Update Item

function UpdateItem(ItemId,isSingleValue){
SP.SOD.executeOrDelayUntilScriptLoaded(function () {
'use strict';
var context = new SP.ClientContext(_spPageContextInfo.siteAbsoluteUrl);
var list = context.get_web().get_lists().getByTitle('CustomList');
var item = list.getItemById(ItemId);
var field = list.get_fields().getByInternalNameOrTitle("MyMMDField");
var taxField = context.castTo(field, SP.Taxonomy.TaxonomyField);
if(isSingleValue == true){ // this you have to handle manually , use
var termValue = new SP.Taxonomy.TaxonomyFieldValue();
termValue.set_label("MyWikiTerm");
termValue.set_termGuid("fb58bc5e-5ce5-41fc-9a90-7431018aa935");
termValue.set_wssId(-1);
taxField.setFieldValueByValue(item, termValue);
item.set_item("Title", "Updated item and Set single valued Taxonomy");
}
else { // this you have to handle manually
item.set_item("Title", "Updated Item and Multi valued Taxonomy");
var pairs = "-1;#MyWikiTerm|fb58bc5e-5ce5-41fc-9a90-7431018aa935;#-1;#MyWikiTerm2|1cee8427-41f1-4a2b-aff3-26c67685988e";
var termValueCollection = new SP.Taxonomy.TaxonomyFieldValueCollection(context,pairs,taxField);
taxField.setFieldValueByValueCollection(item, termValueCollection);
}
item.update();
context.load(item);
context.executeQueryAsync(
function () {
console.log('Item updated sucessfully: ' + item.get_id());
},
function (sender, args) {
console.log("exception in updating item");
});
}, 'SP.Taxonomy.js');
}

Use the same Chrome Developer Console technique to quickly test this function. Type ''UpdateItem(8,false)". Please note that we are updating the same item created using CreateItem method.

Calling update method

Output

I hope this helps ... happy coding..!!!!