Mat Select Default Value

Damian gemza staff answered 3 years ago.

Mat select default value. Tried to set the value of the mat select to the value of one of the mat options. The event selectionchange is used with mat select element as following. To set and get a value for mat select use value ngmodel formcontrol and formcontrolname property. We can also use selected attribute in option tag of select element to set default value selected in select box.

Instead of showing placeholder option i want to preselect an option. Angular material select is created using mat select which is a form control for selecting a value from a set of options. To use angular material select use mat select formcontrol for selecting a value from the set of options. Dynamically set value using formgroup setvalue setvalue sets the value in each and every form control of formgroup.

Before implementing this example create a new angular component with the name nested. I believe that the easiest way is to use ngmodel directive or a one way binding i ll cover it shortly later to manipulate the value of mat select. Find the example to set select option selected using setvalue dynamically. The angular mat select compares by reference between that object and all the available objects in the mat select as a result it fails to select the items you have set in the category field.

This is a pretty common scenario so it should be supported. Consequently you have to implement the compare function to compare any of the list items attributes as you want and then pass this function to the comparewith attribute of the mat select. Material select how to set default value. You can read more about selects in the material design spec.

You can bind a variable which contains elements you want to preselect something like this. Mat select placeholder participants formcontrolname participants multiple ngmodel selection mat option ngfor let participant of. Nested select in this example is two or more mat select dan depending on the first mat select. To add elements to select option we need to use mat option element and to bind value with mat option use value property of it.

My mistake was to do value somenumbervariable to a numeric type variable while the ones in mat options were strings. Angular material select provides selectionchange event that emits when the selected value has been changed by the user. Even if they looked the same in the template. Angular material provides mat select form control for selecting a value from a set of options similar to the native select element.