Filtering specific column in Angular Material Table with filtering in angular?

Question

I am using mat-table. It has a filter which works fine.

Filter happened against this below data (All columns)

const ELEMENT_DATA: Element[] = [
  {posit         


        

Answer 1

In Angular Material Tables, we can create column based filters from data itself.

Source Link

Demo Link

For that, we need to override the filterPredicate method with customFilter() method

        ...
        ngOnInit() {
            this.getRemoteData();

            // Overrride default filter behaviour of Material Datatable
            this.dataSource.filterPredicate = this.createFilter();
        }
        ...

        // Custom filter method fot Angular Material Datatable
        createFilter() {
            let filterFunction = function (data: any, filter: string): boolean {
            let searchTerms = JSON.parse(filter);
            let isFilterSet = false;
            for (const col in searchTerms) {
                if (searchTerms[col].toString() !== '') {
                isFilterSet = true;
                } else {
                delete searchTerms[col];
                }
            }

            let nameSearch = () => {
                let found = false;
                if (isFilterSet) {
                for (const col in searchTerms) {
                    searchTerms[col].trim().toLowerCase().split(' ').forEach(word => {
                    if (data[col].toString().toLowerCase().indexOf(word) != -1 && isFilterSet) {
                        found = true
                    }
                    });
                }
                return found
                } else {
                return true;
                }
            }
            return nameSearch()
            }
            return filterFunction
        }

Check complete working code here