playwright-python执行js自定义方法

之前在Selenium里执行js方法很简单，现在切换到playwright上，发现原来执行js的方式不起作用了,在MSEDGE里执行

 

Selenium里执行JS

driver.execute_script('''function st() {
                                        var height = document.body.clientHeight;
                                        if(height > 10000){
                                            var number = 0;
                                            var length = 0;
                                            var frequency = 15;
                                            var time = setInterval(function(){
                                                number += 1;
                                                if(number == frequency + 1){
                                                    clearInterval(time);
                                                } else {
                                                    length += height / frequency;
                                                    document.documentElement.scrollTop = length;
                                                }
                                            },800);
                                        }else{
                                            var number = 0;
                                            var length = 0;
                                            var frequency = 12;
                                            var time = setInterval(function(){
                                                number += 1;
                                                if(number == frequency + 1){
                                                    clearInterval(time);
                                                } else {
                                                    length += height / frequency;
                                                    document.documentElement.scrollTop = length;
                                                }
                                            },800);
                                        }
                                } st();''')

　　

 playwright 里执行JS的方法是 evaluate，如果要执行上述js方法，需要对其进行修改

  

page.evaluate("""() => {
                var height = document.body.clientHeight;
                var windowHeight = document.documentElement.clientHeight;
                var scrollTop = document.documentElement.scrollTop;
                if(height > 10000){
                    var number = 0;
                    var length = 0;
                    var frequency = 50;
                    var time = setInterval(function(){
                        height = document.body.clientHeight;
                        scrollTop = document.documentElement.scrollTop;
                        if(windowHeight + scrollTop >= height){
                            clearInterval(time);
                        } else {
                            length += 500;
                            document.documentElement.scrollTop = length;
                        }
                    },1500);
                }else{
                    var number = 0;
                    var length = 0;
                    var frequency = 50;
                    var time = setInterval(function(){
                        height = document.body.clientHeight;
                        scrollTop = document.documentElement.scrollTop;
                        if(windowHeight + scrollTop >= height){
                            clearInterval(time);
                        } else {
                            length += 500;
                            document.documentElement.scrollTop = length;
                        }
                    },1500);
                }
            }""")

　　修改后能够正常执行JS操作