JS-VSCODE-TOYPROJECT

if (this.props.keyfilter) { const {keyfilter} = this.props; const regex = KeyFilter.DEFAULT_MASKS[keyfilter] ? KeyFilter.DEFAULT_MASKS[keyfilter] : keyfilter;

        const regexSearch = regex.toString();

        let regExpReplace;

        if (regexSearch.indexOf('[^') != -1) {
            regExpReplace = RegExp(regex.source.replace('[^', "["), `g${regex.flags}`);
        }
        else {
            regExpReplace = RegExp(regex.source.replace(/(.{1})/, "$1^"), `g${regex.flags}`);
        }
        event.target.value = event.target.value.replace(regExpReplace, "");
        return;
    }