@Input('hqConversionCase') hqConversionCaseVal: string;
@HostBinding() get innerHtml() {
if (this.hqConversionCaseVal === "upper") {
return this.innerHtml.toUpperCase();
}
if (this.hqConversionCaseVal === "lower") {
return this.innerHtml.toLowerCase();
}
}This is what I wrote. He always reported that the stack was exceeded. How can I modify the value of the element in the instruction? 
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return this.innerHtml always calls its own function, so this error will be reported.