js takes the value of a feature at a certain position in the string, such as Huawei=> Huawei

let brandName = ' '
if (item.name.indexOf('(') !== -1) {
const index = item.name.lastIndexOf('\(') // Determine if the name has (), if so, remove it
    brandName = item.name.substring(0, index)
} else {
      brandName = item.name
    }

Inspect two knowledge points, the string search indexOf() value is -1, it does not exist