QuerySelector in LWC

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Thanks sir
Sir please make one real life project in lwc

tushargarg

Dude, i am facing an issue when I tried using with lightning combobox. My code is something like this.
1st combobox:
<lightning-combobox name="no1" label='value1' value='' placeholder="test1"
options={no1options} onchange={no1Change} style="color: #000;"
class="no1cls">
</lightning-combobox>
<lightning-combobox name="no2" label="value2" value='' placeholder=test2
options={no2Options} onchange={handleChange} style="color: #000;"
class="no2cls">
</lightning-combobox>
jscode:
handleChange(event) {
let selectedoption = event.detail.value;
let selsesnid =
}
no1Change(event){
let selectedoption1 = event.detail.value;
let no2value =

}
it is returning the error as [Cannot read property 'value' of null]

srujan

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