关于wkwebView字体变小

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {

        let js = "var script = document.createElement('meta');script.name = 'viewport';script.content='width=device-width,initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0,user-scalable=no';document.getElementsByTagName('head')[0].appendChild(script);"

        webView.evaluateJavaScript(js, completionHandler: nil)

    }